Fainthearted (adjective)

1. Lacking courage or confidence; easily discouraged.
2. Easily frightened or intimidated.

Origin:

From faint (lacking strength or courage) + hearted (having a particular kind of heart or disposition).

Examples:

1. He was too fainthearted to speak up in public.
2. The new employee was fainthearted and had a hard time adapting to the job.
3. She was fainthearted about going on the rollercoaster.
4. He was fainthearted about going on a long hike.
5. The soldiers were fainthearted and did not want to fight in the war.