adverb, adverb taking the 'to' particle
smoothly; easily; without a hitch
Describes something proceeding fluidly and without difficulty, such as speaking, writing, or a task. Often used with verbs like 話す, 書く, 進む.
彼女は日本語をすらすら話す。
She speaks Japanese fluently.
The work went smoothly.
He spoke English fluently, without any hesitation.
She finished writing the report smoothly, without any trouble.
The child can already read books fluently.
He answered every question readily, without any hesitation.