also: スムース
na-adjective
smooth; trouble-free; without delays
Used as a な-adjective or with に for a process, conversation, transaction, movement, or operation that proceeds without problems. This word is about smooth progress, not specifically the physical texture of a surface.
会議はスムーズに進んだ。
The meeting went smoothly.
オンラインで手続きがスムーズにできた。
I was able to complete the procedure smoothly online.
彼女の説明はスムーズで分かりやすかった。
Her explanation was smooth and easy to understand.