imperceptible
US /ˌɪm.pɚˈsep.tə.bəl/
UK /ˌɪm.pɚˈsep.tə.bəl/

形容詞
1.
不易察覺的
unable to be noticed or felt because of being very slight:
範例:
•
She heard a faint, almost imperceptible cry.
在 Lingoland 學習這個單詞

不易察覺的
unable to be noticed or felt because of being very slight: