Here is the whole stanza transcribed for you
Trop couuoiteux ne soies mie
Car couuoitise est ennemie
De charite et de sagece
Et te gar de fole largece
gar is from the verb garder to keep from, prevent, beware of.
fole means 'foolish'.
Please attempt a translation into modern English of this Middle French
f8r tsvp