It is a prepositional phrase used as a conjunction.
"In addition" is considered an adverbial phrase that is used to introduce new information or to add to what has already been said.
The word additional is an adjective. It is a supplement.
The part of speech for this particular word is a noun.
the part of speech sashay is a averb
Prefixes do not have their own part of speech.
the part of speech for hand is a noun or verb
Noun
The phrase "in addition" is a prepositional phrase in which "in" is the preposition and "addition" is its object. This phrase, as a phrase, is not a part of speech, although it may function as one, probably an adjective or adverb.
The word additional is an adjective. It is a supplement.
It can be a preposition and an adverb. Preposition: other than; except for Adverb: In addition; also
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
what part of speech is work
adverb
The word 'amendments' is the plural form of the noun'amendment', a word for an alteration, correction, addition, or deletion to a document; a word for a thing.
the part of speech sashay is a averb
"Did not" or "didn't" is a contraction of the auxiliary verb "did" and the adverb "not," forming a negative past tense construction in English.