Unionized is the past form of unionize and, much more often, an adjective. As an adjective it describes a workplace, a group of workers, or a job where a union is in place: "a unionized factory", "unionized nurses", "unionized labour".

Unionized『Unionized』 is是 the past form of...的過去式 unionize『unionize』, and而 much more often更常 an adjective當形容詞用。As an adjective當形容詞時, it它 describes形容 a workplace, a group of workers, or a job一個職場、一群工人，或一份工作 where a union is in place有工會存在的: "a unionized factory"「a unionized factory」, "unionized nurses"「unionized nurses」, "unionized labour"「unionized labour」。

It says something concrete — that these workers are represented by a union, so their pay and conditions are set by a contract the union negotiated, and they cannot usually be dismissed without a set procedure.

It says something concrete它說的是很具體的事——that these workers are represented by a union這些工人是由工會代表, so所以 their pay and conditions他們的薪水和工作條件 are set by是由 a contract the union negotiated工會談判出來的合約決定的, and而且 they cannot usually be dismissed他們通常不能被解雇 without a set procedure除非照一定的程序。

That is why the word turns up in comparisons: unionized workers typically earn more than non-unionized workers doing the same job.

That is why那就是為什麼 the word turns up in comparisons這個字常出現在比較句裡: unionized workers有加入工會的工人 typically earn more通常賺得比較多 than比 non-unionized workers doing the same job做同樣工作的非工會工人。

The opposite is "non-unionized" or simply "non-union".

The opposite is相反詞是 "non-unionized"「non-unionized」 or或 simply就是 "non-union"「non-union」。

As a verb form it is straightforward — "the staff unionized last year" — and it often appears in the passive, "the plant was unionized in 1998". British spelling is unionised.

As a verb form當動詞用時 it is straightforward很直接——"the staff unionized last year"「the staff unionized last year」——and而且 it often appears in the passive常用被動式, "the plant was unionized in 1998"「the plant was unionized in 1998」。British spelling is英式拼法是 unionised『unionised』。