“think”

To weigh a matter carefully and at length in one's mind.

“She sat by the window, pondering whether to leave the city behind for good.”

Best for: Works well in reflective, literary, or emotional writing contexts.

To think deeply and at length about something, often in a brooding or repetitive way.

“He ruminated over the argument for days, replaying every word she had said.”

Best for: Best for obsessive or troubled introspection; slightly formal, psychological tone.

To think deeply and carefully, especially in a deliberate, almost laborious manner.

“The professor cogitated silently before scrawling a single equation on the board.”

Best for: Academic or philosophical settings; carries a sense of concentrated mental effort.

To think something over slowly and informally without rushing to a conclusion.

“Let me mull it over tonight and give you an answer in the morning.”

Best for: Casual, conversational registers; implies unhurried, low-pressure deliberation.

To think out or devise something by careful and intensive mental effort.

“Alone in the archive, she excogitated a theory no scholar had dared to propose.”

Best for: Rare and impressive; suits dense academic prose or deliberately ornate fiction.

To use the mind; to engage in conscious thought or mental activity.

“He cerebrated furiously, but no solution emerged from the fog of exhaustion.”

Best for: Deliberately clinical or ironic in tone; useful when emphasizing the physical act of thinking.