verb

tunnelled

to tunnel

The prisoners tunnelled their way out of the jail.

The prisoners tunnelled their way out of the jail.

Engineers tunnelled through the mountain.

Engineers tunnelled through the mountain.

((to)) tunnel ((through/under/out of sth.)) to dig a passage through, under, or out of something They tunnelled through the mountain.

Synonyms: dig, burrow, excavate

The verb form is derived from the noun 'tunnel'.

This is the action of making a tunnel. Note the double 'l' in the British English spelling 'tunnelled'.

This page is designed for learning support. Please use it as a learning reference, not as a formal reference.