the.com/quaking
The body's honest review of a situation the mind is still pretending is fine.
means Trembling or shaking, usually from fear, cold, or barely-contained emotion.
from From Old English cwacian, to tremble or chatter — same nervous root that gave us the earthquake, where the ground itself loses its nerve.
Religious nicknameQuakers shook with spiritual fervor; the name stuck mockingly.
Aspen treesQuaking aspens rustle from flat, perpetually trembling leafstalks.
Phrase fossilQuaking in your boots survives as pure idiom.