出典:Wiktionary
From Middle English tilte, from 古期英語 tyltan (“to be unsteady”), related to the adjective tealt (“unsteady”), from Proto-Germanic *taltaz, ultimately from Proto-Indo-European *del-, *dul- (“to shake, hesitate”), see also Dutch touteren (“to tremble”), North Frisian talt, tolt (“unstable, shaky”).[1]. Cognate with Icelandic tölt (“an ambling pace”).
The nominal sense of "a joust" appears around 1510, presumably derived from the barrier which separated the combatants, which suggests connection with tilt "covering". The modern transitive meaning is from 1590; the intransitive use appears 1620.
tilt (三人称単数 現在形 tilts, 現在分詞 tilting, 過去形および過去分詞形 tilted)
From Middle English telte, tield, teld, from 古期英語 teld (“tent”), from Proto-West Germanic *teld, from Proto-Germanic *teldą (“tent”). Perhaps influenced by Middle Low German telt,[1] or Danish telt.[2] Cognates include German Zelt (“tent”), Old Norse tjald (“tent”) (whence also archaic Danish tjæld (“tent”)). More at teld.
tilt (三人称単数 現在形 tilts, 現在分詞 tilting, 過去形および過去分詞形 tilted)