Adjective unnerving has 1 sense
- formidable, redoubtable, unnerving - inspiring fear; "the formidable prospect of major surgery"; "a tougher and more redoubtable adversary than the heel-clicking, jackbooted fanatic"- G.H.Johnston; "something unnerving and prisonlike about high gray wall"
Antonym: unalarming (indirect, via alarming)
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Verb unnerve has 1 sense
- faze, unnerve, enervate, unsettle - disturb the composure of
--1 is one way to upset, discompose, untune, disconcert, discomfit
Sample sentence:
The bad news will unnerve him
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