adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
noisily; with heavy footsteps; clatteringly
Describes the sound or manner of heavy, clumsy, or hurried footsteps, often implying a lack of grace or quietness. Used adverbially, often with と or as a する-verb.
子供たちが階段をどたどたと駆け上がった。
The children ran up the stairs noisily.
隣の部屋で誰かがどたどたしている。
Someone is making a clatter in the next room.