Valour

The most appropriate antonym of the word valour is cowardice.

• Valour means courage in the face of danger.
• Cowardice means a lack of courage or bravery.

The other words do not have the same meaning as valour and are therefore not antonyms.

• Bravery is a synonym of valour, so it cannot be an antonym.
• Clever means having or showing quick intelligence or sharp wit.
• Medals are awards given for bravery.