Simple past tense and past participle of spiral.(verb)
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Use "spiralled" in a sentence
"We started with a main objective, and things kind of spiralled out from there."
"It -- you know, everything kind of spiralled downhill for me probably starting back in November."
"I'm sure it's a discussion you've all had from time to time but we were spurred into action by a conversation Trav had from his deathbed with his friend Chris you know the one who was on Blue Peter! and it kind of spiralled from there."