generated at
ally
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noun (plural allies) |ˈalī |
a state formally cooperating with another for a military or other purpose, typically by treaty.
(戦争における)同盟[連合]国
a person or organization that cooperates with or helps another in a particular activity:
協力者, 盟友; 味方
e.g. he was forced to dismiss his closest political ally.
(the Allies) a group of nations taking military action together, in particular the countries that fought with the US in World War I and World War II.
the Allies〗(第1・第2次世界大戦・湾岸戦争での)連合国(→ axis)

verb (allies, allying, allied) |əˈlī| with object (ally something to/ally something with)
combine or unite a resource or commodity with (another) for mutual benefit:
«…と» 同盟連合する, 協力する «with, to»
e.g. he allied his racing experience with his father's business acumen.
(ally oneself with) side with or support (someone or something):
〖~ oneself〗 〈人・国などが〉 «…と» 同盟[連合]する, 協力する «with, to»
e.g. he allied himself with the forces of change.

ORIGIN
Middle English (as a verb): from Old French alier, from Latin alligarebind together’, from ad-to’ + ligare ‘to bind’; the noun is partly via Old French alieallied’. Compare with alloy.

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noun (plural allies)
variant spelling of alley.