We found 3 definitions of unnoticeably from 3 different sources.
Adverb |
||
unnoticeably - in an imperceptible manner or to an imperceptible degree; "the power of the Secretary of State in London increased gradually but imperceptibly" | ||
imperceptibly | ||
noticeably, observably, perceptibly in a noticeable manner; "he changed noticeably over the years" |