In Spanish, scratching is making strokes in a messy way, making stripes or studs. It is made on any surface and with a pencil, a pen or a crayon. In some countries it also means offending, disturbing or angering. Grate, it's crumbling, spraying, limeing. It refers above all to the action of crumbling vegetables with a grallo or grater to make salads.
Scratch is a word that has several meanings.(1) means make or draw lines on a surface.(2) delete or cancel the written or printed with a stripe.(3) stress it written with a stripe to highlight it.(4) Sunrise. Example: scratch the alba.(5) pay (wage of worker or farmer) stripe.Grating means shred a thing with the grater. Example: Please shred the cheese.
