Submitted by György Chityil ... on Fri, 01/19/2018 - 20:39 Hierarchy: VerbDescription: {{dated}} To exhaust; wear out; weary; beat; tire out; to fatigue until unable to do more. {{defdate|from 18th c.}}Ngram: knock upNgram Text: knock upSource: WiktionaryIssue: 0Wiktionary tag: from 18th c.Ngram Count: 2