スムーズsumuuzu

1. na-adjectivesmooth (i.e. without problems)
   課長かちょうが我々われわれに対たいして、あれこれとうるさく言いうのを止とめた途端とたんに、何なんもかもがスムーズに行いき始はじめた。↗

   As soon as our manager got off our backs, everything started to go off without a hitch.

• Synonym円滑えんかつWrittenWritten/formal prose; describes smooth, harmonious running of business or human relations, as in 「円滑な運営」. 「スムーズ」 is the more colloquial choice.
• Synonym順調じゅんちょうNeutralNeutral; says things are going well or progressing favourably, as in 「順調に回復」. 「スムーズ」 stresses that the process runs without hitches.
• Synonym快調かいちょうNeutralNeutral; describes being in good condition and progressing well, as in 「快調に走る」. 「スムーズ」 stresses the absence of hitches.
• Synonym滑らかなめらかNeutralNeutral; covers smooth surfaces and fluent speech, as in 「滑らかな肌」. 「スムーズ」 is about things going ahead smoothly.
• Synonym流暢りゅうちょうNeutralNeutral; refers to fluent, flowing speech, as in 「流暢な日本語」. 「スムーズ」 is about progress going without hitches.
• Related流麗りゅうれいWrittenWritten/formal prose; describes flowing, elegant writing or melody, as in 「流麗な文章」. 「スムーズ」 is the more colloquial word.
• AntonymぎこちないNeutralNeutral; stands opposite to 「スムーズ」 on the fluent–stiff axis, describing awkward, stiff movements or relations.

Use 「スムーズ」 for progress or movement without hitches, as in 「スムーズに進む」. For formal writing choose 「円滑」; for things going well 「順調」; for fluent speech 「流暢」; for smooth surfaces 「滑らか」. The antonym is 「ぎこちない」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 滑なめらか、流暢りゅうちょう、円滑えんかつ。