Learn how to say Unstick correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word unstick:
(unsticks, unsticking; past and past participle unstuck)
1 [with object] cause to become no longer stuck together:
Urquhart sat upright in the bed and unstuck a bleary eye
2 [no object] British informal (of an aircraft) take off:
the aircraft refused to unstick
[with object] cause (an aircraft) to take off.
[in singular] British informal
the moment at which an aircraft takes off:
the minimum unstick speed
come (or get) unstuck
become separated or unfastened:
one of her eyelashes had come unstuck
informal fail completely:
all their clever ideas came unstuck