English clef

← Middle French clef (borrowed)

← Proto-Indo-European *(s)kleh₂w- (root)

← Latin clāvis (derived)

→ English key (link)

→ English clave (doublet)

→ English clavis (doublet)

→ English cleflike (suffix)

→ English cleffer (suffix)

→ Spanish llave (cognate)

→ Indonesian kunci (link)

→ Indonesian kunci (link)

→ Dutch sleutel (link)

→ Polish klucz (mention)

→ Russian ключ (mention)

→ Vietnamese khoá (link)