Many tournament losses are caused by overlooked fool's mates.

Even after the oil spill, he still acted like a fossil fool, insisting on driving his gas-guzzler every day.

The fossil fools disrupted the climate summit with slogans denying the science.

Don't try to con her; she's nobody's fool.

As a seasoned negotiator, Maya knew she was no one's fool.

Despite every warning, the fool-hearted traveler set off alone across the frozen moor.

Foragers should be cautious: fool's watercress grows abundantly along shaded stream banks in spring.

He was punished because he fooled about during the safety briefing.

She fools about during meetings, which frustrates her colleagues.

He acted a fool at the party and later regretted it.