How to say "revert" in Japanese

• 復するふくする
  suru verb (irregular), transitive verb, intransitive verbCovers 'revert (to)': going back to an original or former state, or restoring or being restored to one. A less common verb, it suits descriptions of a situation reverting to what it was before.
• 復すふくす
  godan verb, transitive verb, intransitive verbA shorter form of 復する with the same meaning: to revert to, or return to, an original state. Like 復する, it is a less common way to say 'revert', and the two are interchangeable.
  その市しは一いち週間しゅうかん後ごに平穏へいおんに復ふくした。↗

  The city was restored to tranquility after a week.

Both cover the same sense of 'revert'—returning to an original or former state—and both are less common; 「復す」 is simply a shorter form of 「復する」, so the choice is one of form, not meaning.

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

• 復するふくするto return (to the original state)
• 復すふくすto return (to the original state)