IPA: /pərˈsɛptəblɪ/
KK: /pərˈsɛptəblɪ/
In a way that can be noticed or perceived; something that is clear enough to be seen or felt.
The temperature changed perceptibly as the sun began to set.
Perceptibly → It is formed from "percept" (from Latin "perceptus", meaning perceived) and the suffix "-ibly" (meaning in a manner that can be). The word "perceptibly" means in a manner that can be perceived or noticed.
Think of something that can be 'perceived' — that's what 'perceptibly' means, to notice something in a way that is clear.