How to say "circular" in Japanese

• 丸いまるいJLPT N5approx.Common
  i-adjectiveCovers the shape sense of 'circular': things that are round, circular, or spherical in form. When you mean a physical, geometric circle or round shape, this is the word you want.
  コロンブスは地球ちきゅうが丸まるいと信しんじていた。↗

  Columbus believed that the earth was round.
• 檄げきCommon
  nounThis is a written appeal or manifesto, not a shape word. It matches 'circular' only as a notice circulated to many readers, so it is seldom what you want for round shapes.

「丸い」 covers the shape sense of 'circular' — round, circular, or spherical forms. 檄 is a written appeal or manifesto, matching 'circular' only as a circulated notice, not for shapes.

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

• 丸いまるいround
• 檄げき(written) appeal
• まろやかround
• サーキュラーcircular
• 回文かいぶんcircular (document)
• 回状かいじょうcircular
• 回報かいほうcircular
• 回章かいしょうcircular
• 回し文まわしぶみcircular (document)
• 循環型じゅんかんがたcircular
• 丸っこいまるっこいround
• 輪形りんけいring-shaped
• リング状リングじょうring (shaped)
• 宣伝チラシせんでんチラシpromotional flyer
• まあるいround
• 通牒つうちょうnotice