think

An act of thinking; consideration (of something).

“I'll have a think about that and let you know.”

To ponder, to go over in one's head.

“Idly, the detective thought what his next move should be.”

To communicate to oneself in one's mind, to try to find a solution to a problem.

“I thought for three hours about the problem and still couldn’t find the solution.”

To conceive of something or someone (usually followed by of; infrequently, by on).

“I tend to think of her as rather ugly.”

To be of opinion (that); to consider, judge, regard, or look upon (something) as.

“At the time I thought his adamant refusal to give in right.”

To guess; to reckon.

“I think she’ll pass the examination.”

To plan; to be considering; to be of a mind (to do something).

To presume; to venture.

To seem, to appear.