insure
vt.保证；确保；为…保险；投保
vi.买卖或卖保险
网络解释.给；保证；确保；投保
词形变化:
过去式：insured 过去式：insured 过去式：insuring 过去式：insures
派生词: insurability insurable
vt.1.保护;防卫释义下的同义词
defend protect safeguard cover shelter
2.保证;决定释义下的同义词
make vouch sure affirm determine
3.保证;赞成释义下的同义词
warrant guarantee sponsor certify endorse back assure