embitter
verb /ɪmˈbɪtə(r)/
  /ɪmˈbɪtər/
 Verb Forms
| present simple I / you / we / they embitter |  /ɪmˈbɪtə(r)/  /ɪmˈbɪtər/ | 
| he / she / it embitters |  /ɪmˈbɪtəz/  /ɪmˈbɪtərz/ | 
| past simple embittered |  /ɪmˈbɪtəd/  /ɪmˈbɪtərd/ | 
| past participle embittered |  /ɪmˈbɪtəd/  /ɪmˈbɪtərd/ | 
| -ing form embittering |  /ɪmˈbɪtərɪŋ/  /ɪmˈbɪtərɪŋ/ | 
- embitter somebody to make somebody feel angry or disappointed about something over a long period of time- Years of caring for her ageing parents had embittered her.
- They were becoming deeply embittered by the government’s lack of concern.
- What had embittered them most of all was their exclusion from the judicial process.