German stöhnen

← English stun (mention)

← Proto-Germanic *stenaną (mention)

← Proto-Germanic *stanjaną (mention)

← Middle High German stenen (inherited)

← Middle Low German stenen (mention)

← Old Saxon *stenan (mention)

← Old Saxon *stennian (mention)

→ English stun (cognate)

→ German staunen (mention)

→ German Gestöhn (prefix)

→ Latin tono (cognate)