Re means "thoroughly", li means "bind" able means "capable of". So reliable means able to be trusted to do what is promised. Someone who is reliable is capable of doing something correctly. Do you know someone who is reliable? Make a comment about that person that tells why he or she is reliable.
Let's do some word searching together and make our vocabulary more interesting. I will share a word and its root meaning, then you find other words that have the same root and let's brainstorm what your word may mean before looking it up.