Picture the ground under a hedge, cut through by dozens of narrow tunnels that cross and join and double back. From above you see only small holes. Down inside there is no straight line anywhere, and no way to see where you are going next.

樹籬底下的那塊土:被幾十條窄窄的通道鑽得到處都是,彼此交錯、相通、又繞回來。從地面上看,只看得到幾個小洞。真正進到裡面,沒有一條路是直的。也看不到下一步會通到哪裡。這個「窄、多、繞不出來」的感覺,就是這個詞真正在說的東西。

From the word’s history

From rabbit + warren, where warren itself means a nest or burrow.

這個詞由 rabbit 加 warren 組成,而 warren 本身就是「窩、地洞」的意思。所以字面上就是「兔子的地洞」。也因為 warren 自己已經帶著整套地道的意思,英文常常單用 a warren of…。

Wiktionary, "rabbit warren"

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