German wärmen

← Proto-Germanic *warmijaną (inherited)

← Middle High German wermen (inherited)

← Old High German wermen (inherited)

← Hunsrik wäärme (cognate)

← Luxembourgish wiermen (cognate)

→ German erwärmen (prefix)

→ German anwärmen (prefix)

→ German Wärmer (suffix)

→ German Wärmflasche (compound)

→ Yiddish וואַרעמען (cognate)