0 located under the ground -- souterrain/-e
1 -- sous (la) terre
to tunnel underground creuser une galerie sous la terre
3 (to a position) under the surface of the ground -- sous (la) terre
Rabbits live underground.
4 into hiding -- dans la clandestinité
5 an underground railway; subway American -- métro
She hates travelling by/on the underground.
It can happen anywhere: on the street, on the underground, in someone's own home - women and children cannot feel 100% safe from attack anywhere.
You will drive it underground.
It was, however, also a time of heroic deeds by the underground state and society.
These players are often simply dumped along the way, and subsequently go underground.
We are doing it because the old system of comitology has essentially resulted in underground law, produced by way of methods that are undemocratic, and above all, lacking in transparency.
You have also talked about the final solution for underground storage being reversible.
I do have one concern, however, and that is underground storage.