"Sur un" is French for on a.
You say un crayon in French.
un mois means 'a month' in French.
"un bus" is a bus in French.
un four is an oven in French
'un but' (masc.)
un sac is a bag in French.
a peacock is called "un paon" in French (do not pronounce the "o" in the word)
a jumper is called "un pull / un pullover / un sweat" in French
micro-ondes
A journey is "un voyage" or "un trajet" in French.
un crâne is a skull in French.