ally

US /'ælaɪ/

UK /'ælaɪ/

B1
n.NounSomeone who supports, helps, or defends you
The UK has often been an ally of the United States in times of need
v.t./i.Verb (Transitive/Intransitive)To join a group to offer or receive support
They will ally with the other company to make more money

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