Synonyms: associate, colligate, link, link up, tie in, connect, relate
Definition: make a logical or causal connection
Usage: I cannot connect these two pieces of evidence in my mind; colligate these facts; I cannot relate these events at all
Similar words: think, cogitate, cerebrate
Definition: use or exercise the mind or one's power of reason in order to make inferences, decisions, or arrive at a solution or judgments
Usage: I've been thinking all day and getting nowhere