Definition of "spiralling"

Speaking to Parliament on March 23, Sunak announced a temporary cut in fuel duty of 5p per litre to hard-pressed motorists who have faced spiralling prices for diesel and petrol in recent weeks.

2022 April 6, “Network News: Spring Statement: Sunak accused of making rail less competitive”, in RAIL, number 954, page 8

Dear witch, dear devious dove, I halfway know / The meaning of these giddy spirallings.

c. 1949-1950, Theodore Roethke, In the Bush of her Bones