IPA: /ɪmˈpæl.pə.bli/
KK: /ɪmˈpæl.pə.bli/
In a way that cannot be felt or touched; not perceptible to the senses.
The changes in the atmosphere were impalpably felt by the sensitive individuals in the room.
Impalpably → It is formed from "im-" (meaning not) and "palpable" (from Latin "palpabilis", meaning able to be touched or felt) and the suffix "-ly" (meaning in a manner). The word "impalpably" means in a manner that cannot be touched or felt, indicating something that is intangible or elusive.
Think of 'not' ('im-') being able to be 'touched' ('palpable') — that's why impalpably means something that cannot be felt.