hood

A hood is the soft part of a coat that pulls up over your head when the rain starts. Up goes the hood, and suddenly you can only see straight ahead and can hear nothing but rain on fabric.

The hoodie takes its name from it. A monk has a hood, an academic gown has one, and a hooded figure in a story is somebody whose face you cannot see. In American English the hood is also the metal lid over a car engine, the part British English calls the bonnet, so pop the hood has confused plenty of people on both sides. Other hoods cover other things: the extractor hood over a cooker, the folding hood of a pram. Watch for -hood on the end of a word, which is a separate matter entirely — childhood, neighbourhood and motherhood are states, not head coverings.