I. ˈkru̇k verb
Date: 12th century
transitive verb
: bend
intransitive verb
: curve , wind
II. noun
Etymology: Middle English crok, from Old Norse krōkr hook
Date: 13th century
1. : an implement having a bent or hooked form: as
a. : pothook
b.
(1) : a shepherd's staff
(2) : crosier 1
2. : a part of something that is hook-shaped, curved, or bent
the crook of an umbrella handle
3. : bend , curve
4. : a person who engages in fraudulent or criminal practices
III. adjective
Etymology: probably short for crooked
Date: 1898
Australian & New Zealand : not right:
a. : unsatisfactory
b. : dishonest , crooked
c. : irritable , angry — used especially in the phrase go crook
d. : ill , unwell