英语词汇tooth-ache的起源、历史背景-英语词源词典

词汇	tooth-ache
词源	tooth-ache n. also toothache, Old English toðece; see tooth + ache (n.). Entries linking to tooth-ache tooth n. Old English toð (plural teð), from Proto-Germanic tanthu- (source also of Old Saxon, Danish, Swedish, Dutch tand, Old Norse tönn, Old Frisian toth, Old High German zand, German Zahn, Gothic tunþus), from PIE root dent- "tooth." Plural teeth is an instance of i-mutation. The loss of -n- before spirants is regular in Old English, Old Frisian, and Old Saxon: compare goose (n.), five, mouth (n.). Also thought, from stem of think; couth from the stem of can (v.1); us from uns. Application to tooth-like parts of other objects (saws, combs, etc.) first recorded 1520s. Tooth and nail* as weapons is from 1530s. The tooth-fairy is attested from 1964. ache n. "continuing pain," early 15c., æche, ece "an ache, pain," from Old English æce, from Proto-Germanic *akiz, from same source as ache (v.), which see for the unusual evolution of spelling and pronunciation. updated on October 10, 2017
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tooth-ache n.