Old High German sioh

← Old English sēoc (cognate)

← Proto-West Germanic *seuk (inherited)

← Old Norse sjúkr (cognate)

→ Old English seoc (cognate)

→ German siech (inherited)

→ Old High German siuhhi (suffix)

→ Old High German siohtuom (affix)

→ Old Norse sjúkr (cognate)

→ Old Saxon siok (cognate)