adverb, adverb taking the 'to' particle
walking briskly; determinedly
Describes walking straight toward someone or something without hesitation, often with a sense of purpose or boldness. Frequently used with 歩く or 近づく.
彼は私のところへつかつかと歩いてきた。
He walked briskly up to me.
つかつかと近づいて、いきなり文句を言い始めた。
She came right up to me and suddenly started complaining.