समास (Samas) is the process of combining two or more words into a single compact word — the result is called a समासिक शब्द (samasik shabd) or compound word. The reverse — breaking a compound word back into its parts with connecting particles — is called विग्रह (vigrah).
Think of Samas like a recipe shortcut. Instead of saying "the man who has wealth" every single time, Hindi compresses it into one word: धनवान. The full form is the vigrah; the compressed form is the samasik shabd.
Here's the analogy that sticks: सामासिक शब्द is a suitcase — you pack multiple meaning-items into one tight bag. विग्रह is unpacking that suitcase and laying everything out. In the exam, you're always being asked either to identify the suitcase type, or to check whether the unpacking (vigrah) was done correctly.
Why does the exam test this? Because Samas is tricky at the margins. The same word can look like two different types depending on how you do the vigrah — and that ambiguity is exactly what question-setters exploit. You will see questions where three options have correct vigrah and one has a wrong vigrah, or where you must identify the Samas type from a vigrah. Both formats appear in Bihar Police papers.
The six classical types are:
Master this classification tree and you will handle 90% of Samas questions without hesitation.
The first word is typically a prefix like यथा, आ, प्रति, भर, हर, or a Sanskrit/Persian preposition. The resulting compound functions as an adverb — it does not change its form based on gender/number/case.
Identifying signals:
Examples:
One common trap: मरुस्थल appears in a PYQ as Avyayibhav — note that answer key answers sometimes diverge from mainstream analysis. In your exam, follow the official answer key logic.
Here's the core rule: the first word depends on the second word through an implied case-marker (विभक्ति). The second word is the प्रधान (head word). The type of Tatpurusha is determined by which case-marker was dropped.
| Sub-type | Dropped particle | Example | Vigrah | |---|---|---|---| | कर्म तत्पुरुष | को | ग्रामगत | ग्राम को गया | | करण तत्पुरुष | से/द्वारा | मनमाना | मन से माना | | संप्रदान तत्पुरुष | के लिए | राष्ट्रभक्ति | राष्ट्र के लिए भक्ति | | अपादान तत्पुरुष | से (separation) | देशनिकाला | देश से निकाला | | संबंध तत्पुरुष | का/के/की | राजमहल | राजा का महल | | अधिकरण तत्पुरुष | में/पर | वनवास | वन में वास |
जलधि (जल + धि): जल को धारण करने वाला (that which holds water — the sea). This is Tatpurusha because the first word has a karak relation with the second. Important — this is from a 2021 Bihar Police PYQ.
Often described as a sub-type of Tatpurusha. The distinguishing feature: both words refer to the same entity (same subject). The vigrah uses "है जो" or color/quality descriptions.
Look — this is where most students stumble. If you see an adjective + noun where both refer to the same thing, call it Karmadharaya. If a number is involved, that's Dvigu.
First word is a numeral. The compound denotes a collection or measure.
Critical distinction: The vigrah of Dvigu uses "का समूह / का संग्रह" — a collective idea. If you write "चार हैं जो रास्ते" for चौराहा, you're doing Karmadharaya vigrah on a Dvigu compound. That is exactly the error tested in the 2025 Bihar Police PYQ.
Both words are equally important. The vigrah always uses "और", "या", "एवं", or "तथा".
This is the most intellectually interesting type. The compound does not mean the components — it refers to a third entity that possesses the quality described. Vigrah always uses "जिसका/जिसकी/जिसके — वह".
The Bahuvrihi test: Ask yourself — does the compound refer to one of the component words, or to something/someone else entirely? If it points outside to a third referent, it is Bahuvrihi.
Remember the six Samas in sequence: Avyayibhav, Tatpurusha, Two-subtypes (Karmadharaya + Dvigu), Dvandva, Bahuvrihi — initials spell ATTDB. In the exam, mentally run through this list and eliminate: Is the compound functioning as an adverb? (Avyayibhav). Does first word have a case-relation to second? (Tatpurusha). Are both words the same entity? (Karmadharaya). Is there a number? (Dvigu). Are both words equal? (Dvandva). Does it point to a third referent? (Bahuvrihi). Standard method: scanning randomly — 60+ seconds. This checklist: under 20 seconds.
For any word suspected to be Bahuvrihi, ask one question: "Does this compound describe the components, or point to a THIRD thing?" Add "जिसका — वह" to the vigrah. If the "वह" refers to a mythological figure, a concept, or a person — it's Bahuvrihi. If the "वह" circles back to one of the components, it's Karmadharaya. Example: नीलकमल vs नीलकंठ. नीलकमल = नीला कमल (the lotus itself — Karmadharaya). नीलकंठ = नीला है कंठ जिसका — वह Shiva (third entity — Bahuvrihi). This eliminates the most common 2-mark trap in 5 seconds vs the 30 seconds of confusion without this test.
Any time you see a numeral as the first member (चार, सात, पाँच, तीन, दस), the correct vigrah must contain "समूह", "समाहार", or "संग्रह". If any option offers the vigrah without one of these collective words, eliminate it immediately. चौराहा → "चार राहों का समूह" correct; "चार हैं जो राहें" wrong. This pattern reduces a Dvigu vigrah question from a 40-second analysis to a 10-second scan.
If the first word of a compound is यथा / प्रति / हर / आ / नि / भर / उप / अनु, call it Avyayibhav immediately. These prefixes almost never appear in other Samas types. This is a 3-second identification shortcut. Standard approach of doing full vigrah: 45 seconds. This scan: 3 seconds.
When you need to find which sub-type of Tatpurusha a word is, mentally reinsert the dropped case-marker between the two components. राष्ट्रभक्ति — insert "के लिए" → राष्ट्र के लिए भक्ति → Sampradan Tatpurusha. देशनिकाला — insert "से" (separation) → देश से निकाला → Apadan Tatpurusha. The case-marker that fits naturally is the one that was dropped. This substitution reduces the need to memorize sub-type examples — 5 sub-types resolved in under 30 seconds per word vs 90 seconds of elimination guessing.
When you see a Samas question in the exam hall, follow this decision sequence without deviation:
Step 1 — Check the first word. If it is a prefix (यथा/प्रति/हर/आ) → Avyayibhav. If it is a numeral (चार/सात/पाँच) → Dvigu. Done in 3 seconds.
Step 2 — Check the vigrah structure. If vigrah uses "और/या/एवं" → Dvandva. If vigrah uses "जिसका — वह [third entity]" → Bahuvrihi.
Step 3 — Distinguish Tatpurusha vs Karmadharaya. Ask: do both words refer to the same object? Yes → Karmadharaya. No, first word has a case-relation → Tatpurusha.
Step 4 — For vigrah-error questions: scan for the Dvigu trap (missing "समूह") and the Bahuvrihi trap (vigrah not pointing to a third entity). These are the two most-tested error types in Bihar Police papers.
Never spend more than 45 seconds on a Samas question. If you're still unsure after the 4-step check, mark your best elimination and move on.
Why this question: This 2025 PYQ tests your ability to catch a wrong vigrah — the most common Samas question format in Bihar Police exams. It pits Dvigu against Karmadharaya vigrah on the same word.
Solving path: चौराहा has "चार" (a numeral) as its first component → immediately flag it as Dvigu. Dvigu vigrah must include "समूह": "चार राहों का समूह". Option D offers "चार हैं जो रास्ते" — this is Karmadharaya-style vigrah (using "है जो"), which is wrong for a Dvigu compound. Answer: D.
Why this question: This 2021 PYQ tests Tatpurusha identification — specifically, whether you know that जलधि is not Karmadharaya (same entity) or Dvandva (equal pair).
Solving path: जलधि = जल + धि. धि means "container/holder". The vigrah is "जल को धारण करने वाला" or "जल का आधार". The first word (जल) has a case-relation to the second (धि) — that is the Tatpurusha structure. The two components do not refer to the same entity (ruling out Karmadharaya), there is no numeral (ruling out Dvigu), and no avyay prefix (ruling out Avyayibhav). Answer: A, तत्पुरुष.
Why this question: This 2017 PYQ on मरुस्थल is a reminder to follow the official answer key — an important exam-hall discipline.
Solving path: The official answer key marks this as Avyayibhav (अव्ययीभाव). When a question on your actual paper has a similar word and similar options, check whether the compound functions as an indeclinable adverbial phrase. If the official classification from the exam authority differs from mainstream grammar texts, the official answer key takes precedence for scoring purposes.
Why this question: This 2012 PYQ on अंशुमाली is a classic Bahuvrihi trap — students confuse it with Tatpurusha because of the possessive meaning.
Solving path: अंशुमाली = अंशु + माली. Literal: "rays" + "one who has a garland". Apply the Bahuvrihi Pointer Test: does the compound refer to अंशु or माली? No — it refers to the Sun, a third entity. Vigrah: "अंशु है माला जिसकी — वह (सूर्य)". The "जिसकी — वह" pointing to a third referent confirms Bahuvrihi. Answer: D.
Treating Karmadharaya and Dvigu as the same: Both involve adjective-or-qualifier + noun structures, but Dvigu's first word is specifically a numeral denoting a group. चतुर्दिक (four directions) is Dvigu; महाकवि is Karmadharaya. Never conflate them.
Wrong Dvigu vigrah without "समूह": Writing "चार हैं जो राहें" for चौराहा instead of "चार राहों का समूह" is the exact error Bihar Police set in 2025. Always include the collective marker in Dvigu vigrah.
Calling every mythological name Bahuvrihi: नीलकमल is Karmadharaya (the lotus is blue), but नीलकंठ is Bahuvrihi (Shiva has a blue throat). The difference is whether the compound describes one of its components or points outside to a third referent.
Avyayibhav by prefix assumption only: Not every compound beginning with a Sanskrit prefix is Avyayibhav — उपकार starts with उप but is Tatpurusha ("कार के लिए उप"). Check whether the whole compound functions as an adverb, not just whether the prefix looks like an avyay.
Forgetting that Karmadharaya is a sub-type of Tatpurusha: Some questions ask "कौन-सा तत्पुरुष समास है" and include Karmadharaya examples in the options. Karmadharaya is technically under the Tatpurusha family — don't mark it as a separate category when the question specifically asks for Tatpurusha type.
Ignoring the exam-authority answer key: When the official answer contradicts your analysis (as in the मरुस्थल case), the official answer is the one that gets you the mark. Note these outliers separately and do not apply them as a rule to other words.