ladderyoudaoicibaDictYouDict[ladder 词源字典]
ladder: [OE] Etymologically, a ladder is something that is ‘leant’ up against a wall. Like Greek klīmax ‘ladder’ (source of English climax), it goes back ultimately to the Indo- European base *khli-, source of English lean. Its West Germanic relatives are German leiter and Dutch leer.
=> climax, lean[ladder etymology, ladder origin, 英语词源]
ladder (n.)youdaoicibaDictYouDict
Old English hlæder "ladder, steps," from Proto-Germanic *khlaidri (cognates: Old Frisian hledere, Middle Dutch ledere, Old High German leitara, German Leiter), from PIE root *klei- "to lean" (cognates: Greek klimax "ladder;" see lean (v.)). In late Old English, rungs were læddrestæfæ and the side pieces were ledder steles. The belief that walking under one brings bad luck is attested from 1787, but its origin likely is more pragmatic than symbolic. Ladder-back (adj.) as a type of chair is from 1898.