ขอบคุณ ภาษาอังกฤษ

Etymology tree Proto-Indo-European *tóng-o-s Proto-Germanic *þankaz Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-yéti Proto-Indo-European *-eh₂yéti Proto-Indo-European *-h₂ti Proto-Germanic *-ōną Proto-Germanic *þankōną Proto-West Germanic *þankōn Old English þancian Middle English thanken English thank From Middle English thanken (“to express gratitude, give thanks; to congratulate, rejoice with, or wish joy to; to extol, praise; to hold responsible for”), from Old English þancian, þoncian (“to thank”), from Proto-West Germanic *þankōn, from Proto-Germanic *þankōną (“to thank”), from *þankaz (see etymology 1) + *-ōną (suffix forming infinitives of verbs from nouns). Cognates Cognate with Scots thank (“to thank”), Saterland Frisian tonkje (“to thank”), Cimbrian dånkan (“to thank”), Dutch, German, and Luxembourgish danken (“to thank”), Vilamovian danka, daŋka, daonka (“to thank”), Yiddish דאַנקען (danken, “to thank”), Danish and Norwegian Bokmål takke (“to thank”), Faroese takka (“to thank”), Icelandic þakka (“to thank”), Swedish tacka (“to thank”).