目的を完遂する、目的を遂げる、目的を達するattain one's object in life: 人生{じんせい}の目的{もくてき}を達成{たっせい}するto accomplish (attain) one's object: to accomplish (attain) one's object目的を貫くもくてきをつらぬくattain one's long-cherished object: 本望を遂げる