happo

Etymology
. Modern meaning "acid", originally used more generally of sour things or of leaveners.

Noun

 * 1) acid
 * 2)  A substance that can give a proton to another substance Brønsted acid
 * 3)  A substance that can act as an electron pair acceptor Lewis acid.
 * 4) Any sour or acidic liquid.
 * 5)  A drunkard, sot

Etymology
Borrowed from, equivalent to.

Noun

 * 1) acid

Etymology
From.

Adjective

 * 1) sour