undercharge

[ verb uhn-der-chahrj; noun uhn-der-chahrj ]
/ verb ˌʌn dərˈtʃɑrdʒ; noun ˈʌn dərˌtʃɑrdʒ /

verb (used with object), un·der·charged, un·der·charg·ing.

to charge (a purchaser) less than the proper or fair price.
to charge (a stated amount) less than the proper price: They undercharged several dollars for storing the goods.
to put an insufficient charge or load into.

verb (used without object), un·der·charged, un·der·charg·ing.

to charge too little.

noun

a charge or price less than is proper or customary.
an insufficient charge or load.

Origin of undercharge

First recorded in 1625–35; under- + charge

British Dictionary definitions for undercharge

undercharge
/ (ˌʌndəˈtʃɑːdʒ) /

verb

to charge too little (for)
(tr) to load (a gun, cannon, etc,) with an inadequate charge

noun

an insufficient charge