| 单词 | imperceptible |
| 释义 | imperceptible —imperceptibility, imperceptibleness, n. —imperceptibly, adv. /im'peuhr sep"teuh beuhl/, adj. 1. very slight, gradual, or subtle: the imperceptible slope of the road. 2. not perceptible; not perceived by or affecting the senses. n. 3. something not capable of being perceived by the senses: metaphysical speculation about imperceptibles. [1520-30; < ML imperceptibilis. See IM-2, PERCEPTIBLE] Syn. 2. hidden, unperceivable, undetectable. |
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