She is a great thinker.

He wrote that novel in third person.

Thirdly, if you don't put in the effort and challenge difficult things, there is nothing in the world at which you will succeed.

I quenched my thirst with a cold glass of water.

She thoroughly cleaned the house before the guests arrived.

It's a bit cold, though.

She is a thoughtful person who always considers others' feelings.

He made a thoughtless comment that hurt her feelings.

I need to buy some thread to sew this button back on.

He threatened to expose her secret.