volunteer

US /ˌvɑlənˈtɪr/

UK /ˌvɒlən'tɪə(r)/

B2 中上級TOEIC
adj.形容詞ボランティア 
He is a volunteer driver, he will take you home for free
n. (c.)可算名詞ボランティア
We need a volunteer to help prepare the party
v.i.自動詞奉仕活動を行う
I will volunteer to help you teach the children
v.t.他動詞申し出る
He volunteered to help clean up after the event.
n. (c.)可算名詞志願兵
He was a volunteer in the army.

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