How to say "fit" in Japanese

• はまるJLPT N1approx.Common
  godan verb, intransitive verbIntransitive: something fits into or gets into a space, like a key in a lock; it can also describe being fitted with something, as a door with a window.
• フィットCommon
  noun, suru verb, intransitive verbLoanword for a close, well-matched fit: clothes that fit the body well, or shapes and parts that fit together neatly, giving a snug, tailored impression.
• はめるJLPT N2approx.Common
  ichidan verb, transitive verbTransitive: you fit or insert one thing into another — fitting a pane into a frame, inserting a cork, fastening a button. The mover actively puts the piece in place.
  彼かれの肖像画しょうぞうがは装飾そうしょくの施ほどこされた額縁がくぶちにはめられた。↗

  His portrait was mounted in the fancy frame.
• 適するてきするJLPT N3approx.Common
  suru verb (irregular), intransitive verbAbstract: to fit or suit in the sense of being suitable for conditions, requirements, or a purpose — a person or method that fits the task, rather than objects fitting physically.
  その肉にくは全まったく食用しょくように適てきさなかった。↗

  None of the meat was fit to eat.
• 発作ほっさJLPT N1approx.Common
  nounNoun for a fit in the medical sense: a sudden attack or spasm, as in an epileptic fit, an asthma attack, or a coughing fit — the word you want for that meaning.
  狭心症きょうしんしょうの発作ほっさが起おきました。↗

  I had an angina attack.

For physical fitting, choose intransitive 「はまる」 when something fits into a space and transitive 「はめる」 when you fit something in; 「フィット」 suggests a snug, well-matched fit; 「適する」 covers abstract suitability; 発作 is the medical 'fit'.

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

• はまるto fit
• フィットfit
• はめるto fit (e.g. a pane into a frame)
• 適するてきするto fit
• 発作ほっさfit
• 適当てきとうsuitable
• あてはまるto apply (of a rule)
• 合わさるあわさるto join
• 達者たっしゃin good health
• 取り付けるとりつけるto install
• はめ込むはめこむto fit (e.g. a pane into a frame)
• 激発げきはつfit
• 適すてきすto fit
• 入りきるはいりきるto fit (inside something)
• 身の丈に合うみのたけにあうto fit (e.g. of clothing)
• 立て付けたてつけfitting (e.g. door, window)
• 好適こうてきideal
• 嵌合はめあいfitting together (e.g. nuts and bolts)
• 都合がつくつごうがつくto be possible (in terms of time, money, etc.)
• フィット感フィットかんhow something fits
• 痙攣けいれんconvulsion
• 合うあうto fit
• 元気げんきhealthy
• 健康けんこうhealthy
• まめhealthy
• まぎれbeing gripped by strong feelings
• 格好かっこうsuitable
• 仕込むしこむto insert
• 落ち着くおちつくto harmonize with
• 入るはいるto (be able to) fit (in a container, building, etc.)