insure
/ɪnˈʃɔ:(r); ?@ ɪnˈʃuər; ɪn`ʃʊr/ v
1 [Tn, Tn.pr]
~ sb/sth (against sth) make a contract that promises to pay sb an amount of money in case of accident, injury, death, etc, or damage to or loss of sth 保险; 投保
insure oneself/one's life for 50000 为自己投50000英镑的人寿保险
insure one's house against fire 为自己的房子保火险.
2 (esp US) = ensure.