The word 'tic' entered English in the 17th century from the French 'tic' or 'ticq', denoting a twitching, especially of a facial muscle. Its ultimate origin is obscure but is thought to be onomatopoeic, imitating the sudden, sharp nature of the spasm. This direct, sound-based origin explains its concise form and its primary association with involuntary muscular contractions. The semantic extension to mean a checkmark (a quick, light mark) is a later, figurative development based on the characteristic brevity and decisiveness of the action.

The word 'tic' is a simplex loanword. It is borrowed directly from French, where it originally referred to a twitching or convulsive movement. The French term likely has an imitative or onomatopoeic origin, attempting to mimic the sound or suddenness of the movement.