1580s, "not influenced, untouched in mind or feeling," from un- (1) "not" + past participle of affect (v.). Meaning "not adopted or assumed, genuine" is recorded from 1590s; that of "not acted upon or altered (by something)" is first attested 1830. Related: Unaffectedly; unaffectedness.
entirely unaffected by each other's writings
fibers remained apparently unaffected by the treatment
an unaffected grace
unacknowledged
unacquainted
unadorned
unadulterated
unadvertised
unaffected
unafraid
unaided
unalienable
unalloyed
unalterable
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