think

Judge or regard; look upon; judge.

“I think he is very smart”

“I think that he is her boyfriend”

Focus one's attention on a certain state.

“think thin”

Have or formulate in the mind.

“think good thoughts”

Imagine or visualize.

“Just think--you could be rich one day!”

Ponder; reflect on, or reason about.

Recall knowledge from memory; have a recollection.

“I can't think what her last name was”

Have in mind as a purpose.

“She didn't think to harm me”

Expect, believe, or suppose.

“he didn't think to find her in the kitchen”

Use or exercise the mind or one's power of reason in order to make inferences, decisions, or arrive at a solution or judgments.

“I've been thinking all day and getting nowhere”

Bring into a given condition by mental preoccupation.

Decide by pondering, reasoning, or reflecting.

“Can you think what to do next?”

Dispose the mind in a certain way.

“Do you really think so?”

Be capable of conscious thought.

“Man is the only creature that thinks”

An instance of deliberate thinking.

“I need to give it a good think”