Icelandic þakka

← German danken (cognate)

← English thank (cognate)

← Faroese takka (cognate)

← Proto-Germanic *þankōną (inherited)

← Dutch danken (cognate)

← Old Norse þakka (inherited)

← Swedish tacka (cognate)

→ English thank (cognate)

→ Old English þancian (cognate)

→ Icelandic þakklæti (affix)