单词 | invalid |
释义 | Word Frequency invalid 1(ˈɪnvəlɪd) noun 1. a. a person with disablement or chronic ill health b. (as modifier) an invalid chair adjective 2. incapacitated or disabled by injury, sickness, etc verb (transitive) ▶ USAGE It is best to avoid using the term invalid when referring to people with chronic illnesses or disabilities3. to cause to become an invalid; disable 4. (usually foll by out; often passive) mainly British to require (a member of the armed forces) to retire from active service through wounds or illness Derived forms invalidity (ˌinvaˈlidity) noun Word origin C17: from Latin invalidus infirm, from in-1 + validus strongWord Frequency invalid 2(ɪnˈvælɪd) adjective 1. not valid; having no cogency or legal force 2. logic (of an argument) having a conclusion that does not follow from the premises: it may be false when the premises are all true; not valid Derived forms invalidity (ˌɪnvəˈlɪdɪtɪ) or invalidness (inˈvalidness) noun invalidly (inˈvalidly) adverb Word origin C16: from Medieval Latin invalidus without legal force; see invalid1 |
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