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[ˈtʌnəl]

n. 隧道,地道;(动物栖息的)穴
vt. 掘地道穿过,凿隧道穿过
vi. 掘地道,凿隧道;通过地道(through),进地道(into) 
tunnel(l)ed, tunnel(l)ed, tunnel(l)ing, tunnels  

来源于古法语tonne(桶)指小词tonel.

拆分: tun小桶通道 + n双写 + -el名词词尾  

例:
n.
undersea tunnel 海底隧道 
rail tunnel 铁路隧道 
road tunnel 公路隧道 
A service tunnel runs between the two buildings. 两座大楼之间有一条公共地下信道。 
They’ve built a new tunnel through the mountain. 他们修了一条新的穿山隧道。 
The initial section of tunnel had to be dug by hand. 隧道的起始部份不得不人工挖掘。 
A mouse dug a tunnel under the lawn. 老鼠在草地下打了洞。 
vi.
A rabbit tunnelled under the fence. 兔子在栅栏下挖地道。
vt. 
The insect tunnels its way out of the plant. 昆虫从植物中钻了出来。