턱없이 + adjective: 턱없이 부족하다, 턱없이 비싸다
absurdly, unreasonably, far (too)
Example
이 돈으로는 여행 경비가 턱없이 부족해요.
This money falls far short of what the trip costs.
Word parts
턱 here means 'grounds, reason' (not the chin): 'without reason'.
Good to know
Pronounced [터겁씨]; 턱없이 부족하다 'woefully insufficient' is the top collocation.
Related words