naiant /ˈnāənt, ˈneɪənt 
/ ▸ adjective [postpositive] Heraldry (of a fish or marine creature) swimming horizontally.
– ORIGIN mid 16th century : from Anglo-Norman French, variant of Old French noiant ‘swimming’, present participle of noier, from Latin natare ‘to swim’.
EnglishOxford New American Dictionary
