Tests show that the best method is to read a lot in the English language. Other memorization techniques or taking special classes were found to be effective and worthwhile, so you may wish to investigate a course.

But reading on a daily basis is the best way. Good luck, btw, your English is fairly good, keep working on it. I think you are closer to mastering English than you think.

Ps, according to the studies done in English second language classes found that individuals could pick up the meaning of most words because of their context. In other words your first guess will likely be correct.

Whenever i learnt any new word, learning its meaning is not a big deal but after that i usually frame a sentence of that word……….once i make a sentence on my own this ensure that i have grasped the true meaning and its probable use…….then try to use your word as much as you can in your normal writing & conversations.

if you are done with this, i can assure you that the word will be COPY PASTE in your mind for a long long time……..until it becomes part of your normal conversation.