Why say clumsy, bungling or awkward when ambisinister is crying out to be used? Sure, ham-fisted conjures up comic images of meaty, porcine digits; but for an upmarket dolt who’s all thumbs, a more latinate turn of phrase may be required. Being ambisinistrous is the manual equivalent of having two left feet, literally meaning having two left hands. Etymology: from Latin ambi (both) + sinister (on the left side).

“Calvin struggled to get the key in the lock. The noise behind him was now deafening, but he dared not turn and look. The key danced around the lock, refusing to enter. Fear made his fingers knotted and stupid. Terror rendered him ambisinister.”