二人は若い頃から政治の世界で盟友として支え合ってきた。
The two have supported each other as allies in politics since their youth.
長年の盟友を失い、彼はひどく落ち込んでいる。
Having lost his longtime ally, he is deeply depressed.
首相は盟友である幹事長に党の運営を任せた。
The prime minister entrusted running the party to the secretary-general, his close ally.