different between untuck vs untack

English

un- +? tuck

untuck (third-person singular simple present untucks, present participle untucking, simple past and past participle untucked)

(transitive) To remove something from a relatively hidden location or position where it is tucked.
As soon as work is over, I'm going to untuck this shirt and take off my shoes.
The cat will wake up in a tightly curled position, then untuck her head, and gradually her limbs, and then stretch.
(LGBT, of a drag queen, trans woman, etc.) To remove that which is concealing one’s penis and testicles such as gaff or adhesive tape.

un- +? tack

untack (third-person singular simple present untacks, present participle untacking, simple past and past participle untacked)

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