1. past tense of tunnel; dug or bored a tunnel through or under something
2. moved through a narrow or confined space as if through a tunnel

Examples

• The miners tunneled through the mountain for three years.
• Prisoners tunneled under the prison wall to escape.
• The subway system tunneled beneath the busy downtown area.
• Moles had tunneled throughout the entire backyard.
• She tunneled through the pile of papers on her desk.
• The children tunneled under the blankets during the storm.
• Workers tunneled deep into the earth to reach the water source.