Etymology

Noun

1. A unit of length equal to one-twelfth of a foot and equivalent to exactly 2.54 centimetres.
2. The amount of water which would cover a surface to the depth of an inch, used as a measurement of rainfall.
3. A very short distance.

   "Don't move an inch!"

Verb

1. To move very slowly (in a particular direction).

   Fearful of falling, he inched along the window ledge.