Undercharge

Part of speech: noun (n.)

A charge that is less than is usual or suitable.

Part of speech: verb (v.)

1. To charge below or under; to charge less than is usual or suitable fro; as, to undercharge goods or services.

2. To put too small a charge into; as, to undercharge a gun. Undercharged mine (Mil.), a mine whose crater is not as wide at top as it is deep. W. P. Craighill.