if you mean just the word big then it is magnus. if you mean the phrase, "big in latin," then, depending on the word big is applied to, it could be "magnus in latina," "magna in latina," or "magnum in latina."
Canis magnus is Latin for "big dog."
Validissimus (-a, -um).
Mega is latin. It means "big".
The Latin word for "big nose" is "naso magnus."
deleon
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Silva magna.
Magnus, Magna, Magnum
Megas is a Greek word meaning "big; great". The Latin equivalent is magnus.
The Latin adjective magnus-magna-magnum means "great" or "big."
Ursa As in ursa major and ursa minor, big bear and little bear, the American Native names for the big and little dipper.
because the word is Latin for huge
The word you're probably looking for is "sesquipedalian", which comes from the Latin for "a foot and a half".
ask Mr.Janks big j peice