A person or entity that admits; someone who allows entrance or accepts something as true.
From admit plus -er, a suffix meaning 'one who does' or 'that which does.' The -er suffix comes from Old English and Germanic roots, creating agent nouns from verbs.
Admitter and admittee are mirror images: the admitter is the gatekeeper deciding who enters, while the admittee is the person entering. English uses -er and -ee to flip the perspective of who's doing the action!
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