Definition of tunnel verb from the Oxford Advanced Learner's Dictionary

 

tunnel

 verb
verb
BrE BrE//ˈtʌnl//
 
; NAmE NAmE//ˈtʌnl//
 
Verb Forms present simple I / you / we / they tunnel
BrE BrE//ˈtʌnl//
 
; NAmE NAmE//ˈtʌnl//
 
he / she / it tunnels
BrE BrE//ˈtʌnlz//
 
; NAmE NAmE//ˈtʌnlz//
 
past simple tunnelled
BrE BrE//ˈtʌnld//
 
; NAmE NAmE//ˈtʌnld//
 
past participle tunnelled
BrE BrE//ˈtʌnld//
 
; NAmE NAmE//ˈtʌnld//
 
(North American English also) past simple tunneled
BrE BrE//ˈtʌnld//
 
; NAmE NAmE//ˈtʌnld//
 
(North American English also) past participle tunneled
BrE BrE//ˈtʌnld//
 
; NAmE NAmE//ˈtʌnld//
 
-ing form tunnelling
BrE BrE//ˈtʌnlɪŋ//
 
; NAmE NAmE//ˈtʌnlɪŋ//
 
(North American English also) -ing form tunneling
BrE BrE//ˈtʌnlɪŋ//
 
; NAmE NAmE//ˈtʌnlɪŋ//
 
 
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(tunnelling, tunnelled, (North American English also)tunneling, tunneled) [intransitive, transitive] to dig a tunnel under or through the ground + adv./prep. The engineers had to tunnel through solid rock. tunnel your way + adv./prep. The rescuers tunnelled their way in to the trapped miners. Word Origin late Middle English (in the senses ‘tunnel-shaped net’ and ‘flue of a chimney’): from Old French tonel, diminutive of tonne ‘cask’. The current noun senses date from the mid 18th cent.
See the Oxford Advanced American Dictionary entry: tunnel