The 18 islands which make up the Faroes are connected by 23 tunnels, four of which run below the seaLook, i'm not a rocket scientist nor brain surgeon, so i'm struggling a bit here. Pls help, someone.

What's an island? Ain't it
kinda sorta like a bit of land surrounded by, not to put too fine a point on it, a body of water, which in non-lake & non-riverine contexts, some might consider a bit, well... sea-ish?

So, if one were to have, say, 18 islands, so defined, & if they were all interconnected via tunnels, then... & this seems to be the tricky bit... doesn't it
kinda sorta ipso facto mean that all said tunnels run below the seaI mean, if vehicular transport infrastructure were to connect some islands together but not be "below the sea", mightn't some vulgar cynics tend to opine these would be called, well... bridges ?

What vital concepts & facts am i missing here, pls?
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https://www.bbc.com/news/articles/cvg7jw27w1do

#WhatDoWordsMean #WriteGooder

Shetland eyes Faroes-style tunnels to replace ageing ferries

The local council says it is pushing ahead with plans to build tunnels to four outlying isles in the archipelago.

@MsDropbear42 Not all of the 18 tunnels are connecting islands. Some are just "normal" tunnels through mountains on an island.

https://guidetofaroeislands.fo/travel-information/faroe-islands-tunnels/

explains it a bit better.

I recently watched

https://iview.abc.net.au/show/martin-clunes-islands-of-the-atlantic

The tunnels look cool, actually. There are even roundabouts underground.

Complete Faroe Islands Tunnels Guide (+ Map & Essential Tips) | Guide to Faroe Islands

Your Faroe Islands Tunnels Guide. Get to know all the tunnels in the island group. Including map of all tunnels. Learn more ยป

Guide to Faroe Islands
@petros Yes i know already of what you spoke, but with respect, you've not addressed my specific point. How can tunnels connecting islands NOT ipso facto be "under the sea"? I am not talking about those within islands, only those connecting to other islands.

@MsDropbear42

Imprecise language leads to this statement.

Well, we are all humans ;-)

@petros Not me! ๐Ÿจ๐Ÿ˜œ