Old English syngian

← Old English synniġ (affix)

← Old English -ian (affix)

← Proto-West Germanic *sundīgōn (inherited)

← Proto-West Germanic *sundijōn (mention)

← Old High German suntōn (cognate)

← Old Frisian sendigia (cognate)

← Old Saxon sundiōn (cognate)

→ German sündigen (cognate)