What part of speech is the word "abet" ?

What is the best definition of the underlined word as it is used in the sentence? a statement of wit or amusement an expression of disapproval or condemnation a sentiment of indifference or apathy an exclamation of profound admiration or esteem

This is a word with multiple meanings but spelled the same

What grammatical structure is the italicized portion of the sentence by serving as a popcorn vendor down so many good games