American English: to make effeminate; to cause to lose masculine qualities or adopt feminine characteristics.
American English verb formed from adjective 'effeminate' plus the productive '-ize' suffix. Parallels British 'effeminise' exactly, representing the standard American spelling divergence from British conventions.
The existence of both 'effeminate' and 'effeminize' as verbs is actually redundant—English speakers felt the need to re-verb something that was already verbable, which is the kind of unnecessary complexity that makes English grammar tricky.
American spelling; same causative/normative framing as other forms.
Avoid. Use 'to adopt feminine expression' or 'to present gender-nonconformingly'.
["to adopt feminine expression","to present gender-nonconformingly"]
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