BBB Etymology - Think for Thanks

think Etymology: Middle English thenken, from Old English thencan; akin to Old High German denken to think, Latin tongEre to know

thank Etymology: Middle English, from Old English thancian; akin to Old English thanc gratitude

thanks Etymology: plural of Middle English thank, from Old English thanc thought, gratitude; akin to Old High German dank gratitude, Latin tongEre to know