Proto-Indo-European *ḱel- (cover)

→ English hell (root)

→ English conceal (root)

→ English cell (root)

→ English occult (root)

→ English apocalypse (root)

→ English hall (root)

→ English helmet (root)

→ English supercilium (root)

→ English helm (root)

→ English William (root)

→ English clandestine (root)

→ English calyx (root)

→ English cojones (root)

→ English Calypso (root)

→ English cellar (root)

→ English cilium (root)

→ English hele (root)

→ English ciliary (root)

→ English cellarium (root)