とどこおりなく
without delay; smoothly; without a hitch
Also written 滞り無く
Adverb
準備運動じゅんびうんどうからバタ足あしの練習れんしゅうまで滞とどこおりなく進すすみ、レッスンは至いたって順調じゅんちょう。
Proceeding from warm-up exercises to leg kick practice without a hitch, the lesson went completely smoothly.