Catalan castell

← Latin castellum (inherited)

← Latin castrum (mention)

← Old Occitan castel (inherited)

→ English castell (borrowed)

→ Catalan castellà (suffix)

→ Catalan casteller (suffix)

→ Catalan alcàsser (doublet)

→ Catalan Castelló (suffix)

→ Catalan Castellnou (affix)

→ Spanish castell (borrowed)