Which part of speech is the underlined word in the following sentence? People are pushing past you.

In the sentence 'People are pushing past you,' the word 'past' is used as a preposition because it shows the relationship between the action of pushing and the object 'you' — indicating movement beyond or by someone. As a preposition, 'past' takes 'you' as its object. It is not modifying a verb (adverb), describing a noun (adjective), or showing action (verb) here.