An archaic or rare word meaning agreeable, suitable, or expressing assent; consistent with approval.
From assent (Latin 'assentire', from 'ad-' + 'sentire' to feel/think) + -aneous suffix (relating to, of the nature of). Formed like 'spontaneous' or 'extemporaneous.'
This ultra-rare adjective uses the same -aneous suffix as 'spontaneous' and 'extemporaneous'—a super-productive Latin suffix that English borrowed, but most -aneous words are uncommon because English prefers simpler adjectives.
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