Actually I think there is an abbreviation for the word abbreviate, I'm not sure though.

Haha, funny questions. Abbreviate comes from Latin I think. Brevi is Latin for short. Anyway, it's all relative. "Abbreviate" may look like a long word when compared to "it" or "me" but it's short when compared to "supercalifragilisticexpialidocious". As for mnemonic, just use 'memory aid' or something like that. I know it's cool to use difficult words but it's sort of unnecessary as well. Anyway, I could ask you some questions about Chinese as well. :P Like why is China called "zhongguo" (sorry can't type hanzi on this pc) when it's not really in the middle of the earth. :P :P