ambuscader
/ˌæmbəˈskeɪdər/
noun
- A person who lies in wait to attack by surprise; an ambusher.
- In the old story, the ambuscader was a lone bandit who knew the forest trails.
- The ambuscader hid behind the rocks, waiting for the patrol to pass.
- The soldiers were warned that an ambuscader might be lurking in the narrow canyon.