How to say "contraction" in Japanese

• 収縮しゅうしゅくCommon
  noun, suru verb, intransitive verbThe general word for something physically contracting or shrinking — muscles, blood vessels, pupils, or an economy getting smaller. When you mean contraction in the basic physical sense, this is usually the word.
  瞳ひとみは日ひのあたる所ところでは収縮しゅうしゅくする。↗

  The pupils of the eyes contract in sunlight.
• 短縮たんしゅくJLPT N1approx.Common
  noun, suru verb, transitive verbCovers contraction in the sense of shortening: making a span of time, a distance, or a procedure shorter. It is about reduced length or duration, not about something shrinking in size.
  その橋はしのおかげで、私達わたしたちは大おおいに時間じかんが短縮たんしゅくできた。↗

  The bridge saved us a lot of time.
• 緊縮きんしゅくCommon
  noun, suru verb, transitive verb, intransitive verbContraction as tightening rather than shrinking: budgets, spending, or credit being drawn tighter. It is the natural choice in fiscal and monetary talk, less so for physical contraction.
• 縮減しゅくげんCommon
  noun, suru verb, transitive verbCenters on reduction: bringing the scale, size, or scope of something down, such as operations or numbers. For physical contraction it is marginal; think of it primarily as a word for scaling down.
• 収斂しゅうれんCommon
  noun, suru verb, transitive verb, intransitive verbBelongs chiefly to medicine and the sciences, covering astringency and constriction — an astringent, tightening action rather than everyday shrinking. For ordinary 'contraction' it is seldom the word you want.

Use 収縮 for physical shrinking or tightening, 短縮 for making something shorter in time or length, 緊縮 for tightening budgets or policy, 縮減 for scaling down in size or scope, and 収斂 for technical astringent or constrictive action.

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

• 収縮しゅうしゅくcontraction
• 短縮たんしゅくshortening
• 緊縮きんしゅくtightening
• 縮減しゅくげんreduction
• 収斂しゅうれんastringency
• 縮小しゅくしょうreduction
• 狭窄きょうさくcontraction
• コントラクションcontraction
• 短縮形たんしゅくけいcontraction
• 約音やくおんcontraction (in phonetics)
• 約転やくてんcontraction (in phonetics)
• 約言やくげんsummary
• しぼりcontraction
• 萎縮いしゅくcontraction
• 縮約しゅくやくcontraction
• 約やくcontraction (in phonetics)