We retain information better when we can forge connections with our existing bank of knowledge. Therefore every time you learn a new word try and recall all the other contexts in which that word has been used.
I did this with my 7 year old son recently. He learnt the Arabic word ‘Sadr’ chest, he already knew the dua of Musa (A.S) before he went to meet the Pharoah, where the word ‘Sadri’ my chest is used. So I retold the story to him in a manner which is appealing to 7 year old boys, reinforcing words like ‘imagine’ which help to create emotional connections by generating feelings within the listener. Then I told him how Allah mentions this word ‘Sadr’ a few times in the Qur’an, in various formats, when He says ‘He Knows what is in our chests’, ‘He is well acquainted with what our chests conceal’ etc. Then we looked at an anatomy chart and pointed out sadr, later that week we did push ups that work… ‘the chest’ all the while calling it ‘sadr’. Lo and behold, he learnt the Arabic word for chest.
This an oversimplified overview of how to make connections you can go much deeper than that. In the masjid I teach at, I have found linking my teaching material with the school curriculum a very effective approach.