Simple past tense and past participle of surround.
A throng of officers surrounded him.
It dead-ended at the cottage, surrounded by a stone fence line.
They were led to a room with a long table in the center surrounded by chairs.
So I'm going to be stuck on a planet far away without a bus ticket home surrounded by spiders the size of basketballs and being bossed around by Neanderthal barbarians who forbid me to talk and lock me in the bathroom!
Keene was once called The Elm City before Dutch elm disease destroyed the massive trees that surrounded the grassy area at the head of the square.