adverb, adverb taking the 'to' particle
briskly with small steps; trotting
Describes a light, quick walking or running motion with short steps, often used for children or small animals.
子どもがトコトコと歩いてきた。
The child came walking briskly with small steps.
子犬がトコトコついてくる。
The puppy follows me, trotting along.