Question

What tools can you use to understand words you do not know? how can you tell what sources are good and what sources are not?

Answer 1

For question 1: Dictionary, Thesaurus.

Answer 2

I would use dictionaries, intelligent people and my own judment .

Step-by-step explanation:

Dictionaries on hard copies or online ones, specially the good and famous ones, renowned intelligent people around me and last but not least my own judment by comparing , taking risk and copying successfull ideas and strategies.