DICT.TW Dictionary Taiwan

 imperceptibly
 (ad.)不可覺地,微細地,極微地

 Im·per·cep·ti·ble a.  Not perceptible; not to be apprehended or cognized by the senses; not discernible by the mind; not easily apprehended.
    Almost imperceptible to the touch.   --Dryden.
    Its operation is slow, and in some cases almost imperceptible.   --Burke.
 -- Im*per*cep*ti*ble*ness, n. -- Im*per*cep*ti*bly, adv.
    Their . . . subtilty and imperceptibleness.   --Sir M. Hale.
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 imperceptibly
      adv : in an imperceptible manner or to an imperceptible degree;
            "the power of the Secretary of State in London
            increased gradually but imperceptibly" [syn: unnoticeably,
             observably] [ant: perceptibly]