It is a complex preposition as long as it is used as a phrase.
The phrase "long-time" is an adjective. It means to be extending over a very long time period.
adverb
the long form for o'clock, is when it is a time
what part of speech is beneath
i want to know what part of speech is camping
The word "tirade" is a noun. It refers to a long, angry speech or rant.
It is a verb. Example: He lingered a long time at the cafeteria.
The word "monologue" is a noun. It refers to a long speech or performance by one person.
part of speech
The part of speech for this particular word is a noun.
The phrase "long-time" is an adjective. It means to be extending over a very long time period.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.