Dragon is from Old French 'dragon', from Latin 'draco' ('huge serpent, dragon'), from Ancient Greek 'drakōn' ('serpent'), probably from 'derkesthai' ('to see clearly'). The ancestry passes through Old French dragon, Latin draco, and Ancient Greek drakōn. In present use as a noun, it means "a mythical fire-breathing reptilian monster", keeping the historical formation close to the word's ordinary semantic work. Related words include dragoon and drake; derived forms include dragonish and dragonet. The surrounding word family keeps the same base visible in dragonish, dragonet, dragoon, and drake, showing how the headword belongs to a larger cluster rather than standing alone.