to become or cause to become loose or not tucked in
to untuck the blankets
untuck in American English
(ʌnˈtʌk)
verb transitive
to undo a tuck or tucks in; free from a tuck or fold
untuck in American English
(unˈtʌk)
transitive verb
to release from or bring out of a tucked condition
She untucked her legs
Word origin
[1605–15; un-2 + tuck1]This word is first recorded in the period 1605–15. Other words that entered Englishat around the same time include: classic, displacement, ferrule, pivot, surfaceun- is a prefix freely used in English to form verbs expressing a reversal of some actionor state, or removal, deprivation, release, etc. (unbend; uncork; unfasten; etc.), or to intensify the force of a verb already having such a meaning (unloose)