unionize
verb /ˈjuːniənaɪz/
  /ˈjuːniənaɪz/
(British English also unionise)
 [transitive, intransitive]Verb Forms
| present simple I / you / we / they unionize |    /ˈjuːniənaɪz/   /ˈjuːniənaɪz/  | 
| he / she / it unionizes |    /ˈjuːniənaɪzɪz/   /ˈjuːniənaɪzɪz/  | 
| past simple unionized |    /ˈjuːniənaɪzd/   /ˈjuːniənaɪzd/  | 
| past participle unionized |    /ˈjuːniənaɪzd/   /ˈjuːniənaɪzd/  | 
| -ing form unionizing |    /ˈjuːniənaɪzɪŋ/   /ˈjuːniənaɪzɪŋ/  | 
- unionize (somebody/something) to organize people to become members of a trade union; to become a member of a trade union
- a unionized workforce
 - They were forbidden to unionize.
 
Oxford Collocations DictionaryUnionize is used with these nouns as the object:- worker