im·per·cep·ti·ble ( m p r-s p t-bl)adj. 1. Impossible or difficult to perceive by the mind or senses: an imperceptible drop in temperature. 2. So subtle, slight, or gradual as to be barely perceptible: an imperceptible nod. im per·cepti·bili·ty, imper·cepti·ble·ness n.im per·cepti·bly adv. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Adv. | 1. | imperceptibly - in an imperceptible manner or to an imperceptible degree; "the power of the Secretary of State in London increased gradually but imperceptibly" noticeably, observably, perceptibly - in a noticeable manner; "he changed noticeably over the years" |
imperceptibly
adverb invisibly, slowly, subtly, little by little, unobtrusively, unseen, by a hair's-breadth, unnoticeably, indiscernibly, inappreciably
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