If you find it difficult to remember the meaning of a word write it on a card – then look it up in Wiki or Google and copy out (with pen and paper on the other side of the card) a few sentences that you find relating to the word.
For example: squirrel
On Wikipedia – One well-known trait of some species of squirrel is the gathering and storing of nuts for the winter.
On Google – Squirrel is the common name for rodents of the family Sciuridae, and can sometimes be used to describe someone who is a ‘goof’ or ‘clown’.
Review your cards at random from time to time.