Significados de unwary movement en inglés

An unwary movement of my hand caused the screen to creak.

Do you make one unwary movement, and over comes a flock of shells.

I fancied even that he walked lightly and gingerly, as if the slightest unwary movement might break the spell.

But the slightest unwary movement would have led the suspicious Indians so to redouble their vigilance as to render escape utterly impossible.