Tra từ ally - Từ điển Oxford Advanced Learner 8th

ally [ally allies allied allying] noun, verb
noun BrE [ˈælaɪ] ; NAmE [ˈælaɪ] (pl. allies)
1. countable a country that has agreed to help and support another country, especially in case of a war
•our European/NATO allies
•a loyal ally of the United States
2. countable a person who helps and supports sb who is in a difficult situation, especially a politician
•a close ally and friend of the prime minister
• His sister was his ally against their grandparents.
3. the Alliesplural the group of countries including Britain and the US that fought together in the First and Second World Wars
•the Western Allies

Word Origin:
Middle English (as a verb): from Old French alier, from Latin alligare ‘bind together’, from ad- ‘to’ + ligare ‘to bind’; the noun is partly via Old French alie ‘allied’. Compare with ↑alloy.

Thesaurus:
ally noun C
•a friend and ally of the prime minister
associate • • colleague • • partner • • friend • • contact • • collaborator • |BrE, informal mate • |AmE, informal buddy •
Opp: enemy
a close ally/associate/colleague/partner/friend/contact/collaborator
an old ally/associate/colleague/friend/mate/buddy
a business ally/associate/colleague/partner/contact
a political ally/associate/colleague/contact

Word Family:
ally verb noun
allied adjective
alliance noun

Example Bank:
•Charles remained a close ally of the French king.
•He now had an ally against his boss.
•Jane felt that she had an ally.
•Portugal is a traditional ally of England.
•She had found an ally in her old teacher.
•a friend and ally of the president
•He's a close friend and ally of the prime minister.

verb BrE [əˈlaɪ] ; NAmE [əˈlaɪ] (al·lies, ally·ing, al·lied, al·lied)transitive, intransitive ~ (yourself) with sb/sth
to give your support to another group or country
• The prince allied himself with the Scots.
Verb forms:

Word Origin:
Middle English (as a verb): from Old French alier, from Latin alligare ‘bind together’, from ad- ‘to’ + ligare ‘to bind’; the noun is partly via Old French alie ‘allied’. Compare with ↑alloy.

Word Family:
ally verb noun
allied adjective
alliance noun