thankworthy

From Middle English thankworthy, thank-worthy, þankeworþi, probably an alteration (with -y) of earlier Middle English thanke worth, thankworth, þancwurðe (“thankworthy”), from Old English þancwyrþe, þancweorþ (“thankworthy, deserving thanks, acceptable”), equivalent to thank +‎ -worthy. Cognate with German dankwürdig (“worthy of thanks”).