adverb, adverb taking the 'to' particle
thick and gooey; muddy; syrupy
Describes a liquid that is thick, heavy, and slow-moving, often with a muddy or syrupy quality. Used with と or as an adverb.
どろりとしたソースがパスタによく絡む。
The thick, gooey sauce clings well to the pasta.
雨のあと、道がどろりとぬかるんでいた。
After the rain, the road was muddy and slushy.
Mimetic word; the exact origin is uncertain, but it likely derives from the sound or sensation associated with thick, muddy liquids.