IPA: /ˈpæl.pə.bli/
KK: /ˈpæl.pə.bli/
In a way that can be easily perceived or felt; clearly noticeable.
The tension in the room was palpably felt by everyone present.
Palpably is formed from "palpable" (from Latin "palpabilis", meaning able to be touched or felt) and the adverbial suffix "-ly" (meaning in a manner of). The word "palpably" means in a manner that can be touched or felt, or clearly evident.
Think of something that can be 'touched' or 'felt' ('palpable') — and the '-ly' just means in that manner. So, when something is palpably clear, it means you can really feel or sense it.