tunnel under (something)

tunnel under (something)

To dig a passageway underneath someone or something. We've had a real problem with groundhogs tunneling under our lawn. The only way we'll get past those guards is by tunneling under them.
See also: tunnel

tunnel under someone or something

to dig a tunnel under someone or something. All the time she was standing in the yard talking about the moles, they were tunneling under her. They took many months to tunnel under the English Channel.
See also: tunnel