Prefixes, Suffixes and Vocabulary

Prefixes : https://www.learnenglish.de/grammar/prefixtext.html

Prefixes come BEFORE the Root Word.

Suffixes : https://www.learnenglish.de/grammar/suffixtext.html

Suffixes come AFTER the Root Word.

Vocabulary : https://www.thoughtco.com/esl-vocabulary-4133092

To find the meaning of words you don't know use a thesaurus :

https://www.freethesaurus.com/