noun a person who leads a congregation in singing or prayer in a synagogue
noun a method of voice production used by male singers, especially tenors, to sing notes higher than their normal range
adjective relating to or characteristic of the singing voice of a falsetto
noun Noun is a person, place, thing, or idea. In this case, 'unison' is a noun referring to the state of being together or in harmony.
adverb Adverb modifies a verb, an adjective, or another adverb. In this case, 'in unison' modifies how an action is done or how something is being done in a synchronized manner.
preposition Preposition shows the relationship between a noun (or pronoun) and other words in a sentence. In this case, 'in' shows the location or position of the action being done in a synchronized manner.
article Article is a type of determiner that specifies if a noun is specific or unspecific. In this case, 'in' is the article specifying the relationship between the action and the state of being in unison.