The forms are:
universe - (noun) the entirety of stars and space
universal - (adjective) of the universe, or made for overall use
un poco
You spell on in Welsh as ar.
a jumper is called "un pull / un pullover / un sweat" in French
un canonnier, un mitrailleur (smaller calibers)
How do you spell pig in French? un cochonle porc
un, une
un volcan
un neveu
un or une
un euro
un requin
un ensemble