| 词汇 | invalid |
| 词根词缀 | 词源： invalid (adj.) 1635, "not strong, infirm," also "of no legal force," from L. invalidus "not strong, infirm, weak, feeble," from in- "not" + validus "strong." Meaning "infirm from sickness, disease, or injury" is from 1642. The noun is first recorded 1704, originally of disabled military men. Invalidate is from 1649. Invalides is short for Fr. Hôtel des Invalides, home for old and disabled soldiers in Paris. 词根记忆： n. 病人,伤残人a.有病的,伤残的;无效的He helps to look after his grandfather who is an invalid.他帮助照看他病弱的祖父. a. 虚弱的n.病人(in不+val+id→不强壮的)[vail,val=strong,表示"强壮"] a. 无效力的(in无+val力量+id)[-id表形容词,"如…的"] |
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