English unthankful

← Old English unþancful (inherited)

← Old English unþancfull (mention)

← Old English unġeþancfull (mention)

← English un (prefix)

← English thankful (prefix)

← Middle English unthankful (inherited)

← Old High German undankfol (cognate)

→ English unthankfulness (suffix)

→ English unthankfully (suffix)