Proto-West Germanic *sikur

→ English sicker (inherited)

→ Afrikaans seker (inherited)

→ Old English sicor (inherited)

→ Cimbrian sichar (inherited)

→ Welsh sicr (derived)

→ Danish sikker (derived)

→ German sicher (inherited)

→ Middle English siker (inherited)

→ Old High German sichur (inherited)

→ Luxembourgish sécher (inherited)

→ Dutch zeker (inherited)

→ Swedish säker (derived)

→ Yiddish זיכער (inherited)