defeatist

noun
UK /dɪˈfiːtɪst/
US /dɪˈfiːtɪst/

A defeatist is someone who gives up easily and thinks they will lose.

Don't be a defeatist; try your best and see what happens.


OTHER MEANINGS

2. Showing a belief that success is impossible.

He had a defeatist attitude about the game before it even started.

3. The act of expecting to fail and not trying.

Her defeatist thinking stopped her from joining the team.

4. A person who spreads doubt and gives up on goals.

The coach told the defeatist to cheer for the team instead.