If you are saying the number alone, then you would say, "Un." If you are saying that there is one of something, and the thing is masculine, you would also say, "un". However, if the thing is feminine, you would say, "une".
a boat is 'un bateau' in French. the plural is 'des bateaux'
The correct spelling of "croissant" in French is C-R-O-I-S-S-A-N-T.
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Did you ever learn to spell?
It is spelled "enero", and is not capitalized.
fille
mardi
un, une
In Spanish, it is spelled Roja. It means 'red.'
une sœur
un, deux, trois
120 = cent vingt