unionize
verb [ T ] (UK usually unionise) uk/ˈjuː.njə.naɪz/ us/ˈjuː.njə.naɪz/
使加入工会
to organize workers to become members of a trade union
They're about to launch a campaign to unionize workers at all major supermarkets in the area. 他们准备发起一场运动，号召本地区所有大型超市的员工都加入工会。
unionized employees/labour/workers 加入工会的雇员／劳动者／工人