The thing doing the erasing (ie eraser) is feminine (la gomme). The thing which was erased (ie erasure) has two forms--one masculine and one feminine.
an eraser is a female or in other words a faminine
Borrador mean eraser, as in office supplies.
Feminine
This word is french and means rubber/eraser.
its masculine no doubt
feminine
Masculine
masculine
La pizarra is feminine, (el) is masculine, and (la) is feminine.
Une école feminine
it is masculine so El
directeur → masculine directrice→ feminine