1. people who dig or construct tunnels
2. soldiers who dig underground passages beneath enemy positions
Usage: military; historical

Examples

• The tunnelers worked around the clock to complete the subway extension.
• Construction tunnelers used heavy machinery to bore through the mountain.
• During World War I, tunnelers dug beneath enemy trenches to plant explosives.
• The mining company hired experienced tunnelers for the new project.
• Military tunnelers required special training in underground warfare.
• The tunnelers encountered unexpected rock formations that slowed progress.