Word Roots Strategy

Source: Kaplan GRE Pocket Reference

I'm not good in memorizing vocabularies. Sometimes I just go by guessing the words from its sound ;p. I learned an interesting way to 'guess' the meaning of some words by memorizing only the word roots. For example:

Dol means pain, suffer.

So any word which has the word root 'dol' will somehow gives the meaning of suffer or pain.

For example: Doleful means sorrowful
Doldrums means dull, depressed mood (somehow gives the meaning of suffering)

Good luck, friends! :)