undercut
verb /ˌʌndəˈkʌt/
  /ˌʌndərˈkʌt/
 Verb Forms
| present simple I / you / we / they undercut |    /ˌʌndəˈkʌt/   /ˌʌndərˈkʌt/  | 
| he / she / it undercuts |    /ˌʌndəˈkʌts/   /ˌʌndərˈkʌts/  | 
| past simple undercut |    /ˌʌndəˈkʌt/   /ˌʌndərˈkʌt/  | 
| past participle undercut |    /ˌʌndəˈkʌt/   /ˌʌndərˈkʌt/  | 
| -ing form undercutting |    /ˌʌndəˈkʌtɪŋ/   /ˌʌndərˈkʌtɪŋ/  | 
- undercut somebody/something to sell goods or services at a lower price than your competitors 
- to undercut somebody’s prices
 - We were able to undercut our European rivals by 5%.
 
 - undercut somebody/something to make somebody/something weaker or less likely to be effective synonym undermine
- Some members of the board were trying to undercut the chairman's authority.