Proto-West Germanic *þankijan

→ Old English þencan (inherited)

→ Old English aþencan (mention)

→ German denken (inherited)

→ Middle Dutch denken (inherited)

→ Middle Low German denken (inherited)

→ Old High German denken (inherited)

→ Luxembourgish denken (inherited)

→ Mòcheno denken (inherited)

→ Low German denken (inherited)

→ Dutch denken (inherited)

→ Old Dutch thenken (inherited)

→ Old Saxon thenkian (inherited)

→ Saterland Frisian toanke (inherited)

→ Yiddish דענקען (inherited)