First public appearances or introductions, or as a verb, makes first appearances.
Plural noun or third person singular verb form of 'debut,' from French 'début' (beginning). Functions both as a countable noun ('multiple debuts') and as a verb form ('he debuts in the role').
The word 'debuts' is fascinating because it's almost always singular in meaning—even 'multiple debuts' refers to different events, not multiple beginnings of one thing.
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