late 14c., "weak, unsound" (of things), from Latin infirmus "weak, frail, feeble" (figuratively "superstitious, pusillanimous, inconstant"), from in- "not, opposite of" (see in- (1)) + firmus (see firm (adj.)). Of persons, "not strong, unhealthy," first recorded c. 1600. As a noun from 1711.
例文
1. We are here to protect and assist the weak and infirm .
私たちはここに来て高齢体弱者を保護し、助けます。
2.care for the elderly and infirm
年老いた体の弱者への配慮
3.He was over eighty years of age, infirm and totally blind.
彼は80代で体が弱く、両目が失明している。
4.His already infirm body was racked by high fever.
彼はすでに弱った体で高熱に苦しんでいる。
5.Let the sails be rags and the sailors infirm and sickly.