Bismillah alhamdulillah.

Language learning is a continuous process and without realising it by the time a student reaches university they have a very wide ranging vocabulary. One of the major problems that learners of a new language face is vocabulary acquisition, getting new words into their receptive and expressive memories. There is an interesting PhD Research proposal which looks at this problem and offers some interesting ideas and vocabulary acquisition strategies.

The good news is that by just knowing 2000 word families a person will understand 80% of the words he reads. The bad news is that the 20% of words that remain are the key to understanding the meaning. Also guessing the meaning of the new words from context is not possible when you only know 80% of the words. The silver lining to the cloud is that if you understand 95% of the words then you can have a much better chance of successfully guessing the meaning of the remaining words. You can achieve this by having a vocabulary of 3000 word families. Though a guess it is probably not a bad estimate that this applies equally to knowledge of Arabic roots.

Though quite long it is a valuable read for anyone interested in the topic or struggling to learn those elusive 20,000 word families that will give university level proficiency in a target language!