unhinge
[verb]
Synonyms: upset, derange, disorder, sicken, turn, unsettle, madden, craze, distract, frenzy, unbalance, discompose, agitate, bother, disquiet, disturb, flurry, fluster, perturb, untune

[TahlilGaran] English Synonym Dictionary ▲

un‧hinge /ʌnˈhɪndʒ/ verb [transitive]
to make someone become very upset or mentally ill:
The terrible experience seemed to have unhinged him slightly.
—unhinged adjective

[TahlilGaran] Dictionary of Contemporary English ▲