un‧der‧cut /ˌʌndəˈkʌt $ -ər-/ verb (past tense and past participle undercut, present participle undercutting) [transitive]
[Word Family: noun: cut, cutting, cutter; verb: cut, undercut; adjective: cutting]

1. to sell goods or a service at a lower price than another company Synonym : undersell:
Online bookstores can undercut retailers by up to 30%.

2. to make something weaker or less effective Synonym : undermine:
Is a lack of self-confidence undercutting your performance at work?

[TahlilGaran] Dictionary of Contemporary English ▲

undercut
to sell your product for less than a competitor
The new discount store is trying hard to undercut other stores in the area.

[TahlilGaran] English Idioms Dictionary ▲