Translation of "ad" into English

Jeg er bekymret over, at de konservative bruger denne metode til at genindføre atomkraft ad bagdøren.

I am concerned that the conservatives are using this method to reintroduce nuclear power by the back door.

Tom var den eneste der ikke lo ad Marys joke.

Tom was the only one who didn't laugh at Mary's joke.

I vil gå med dem ad den vej, der fører til et evigt familiehjem.

You will move with them along the path to an eternal family home.