to cause (oneself, a person) to become cheap

diminish worth

cut back on something

economize

to speak against (something) especially with sarcasm

criticize, blame

to become lower in value

devalue, lose value

(to cause the value of a currency) to become less (especially in exchange for other currencies)

depreciate

to cut away the outer part, edge or skin of (something)

peel, trim

to make (something), become, smaller in size, number, degree, price etc

make less; decrease

to put another price on (something); to increase the exchange value of (money)

depreciate

to sell (goods) at a lower price than competitors

lower, reduce cost

of undersell

lower, reduce cost