How to say "stringent" in Japanese

• 厳重げんじゅうJLPT N2approx.Common
  na-adjective, nounCovers 'stringent' in the sense of strict, rigorous, tightly maintained — stringent security, precautions, checks, or supervision. It describes measures and controls being airtight rather than treatment being harsh or cruel.
  トップエンジニアが、その車くるまに一連いちれんの厳重げんじゅうな検査けんさを加くわえた。↗

  The top engineer put the car through a series of rigorous tests.
• 酷こくCommon
  na-adjective, nounReally means harsh, severe, or cruel; it fits 'stringent' only when the emphasis is on conditions or treatment being punishingly tough. For stringent rules, controls, or security, 厳重 is the word you want.

Use 厳重 for 'stringent' meaning strict and tightly enforced, as with security, checks, or precautions; use 酷 only for the harsh, severe side of 'stringent', when conditions or treatment feel punishing rather than strictly regulated.

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

• 厳重げんじゅうstrict
• 酷こくsevere