navy
noun
[ ˈneɪvi ]
• the branch of the armed services of a state which conducts military operations at sea.
• "she joined the navy in 1990"
• a dark blue colour.
• "the dress comes in navy, gunmetal grey, or black"
Origin:
late Middle English (in the sense ‘ships collectively, fleet’): from Old French navie ‘ship, fleet’, from popular Latin navia ‘ship’, from Latin navis ‘ship’.