How to disable keys from the keyboard?

Question

At work I got a new laptop with a full keyboard(it has numpad), but the laptop is not that big, and because of that the keys are relatively small, which means I am constantly finding myself pressing keys accidentally on the numpad part, is there a way to simply disable specific keys that I simply don't want?

Answer 1

I have the Menu key very close to the control and left-arrow keys.
This is how I disabled it,

xmodmap -e "keycode 135 = 0x0000"

Some references to get around with things.

1. xev will let you identify the keycode for your key of interest.
   Look at its man page, This is a good quick reference too,
   Mediakeys with .Xmodmap HOWTO
2. ArchWiki has a good description for xmodmap