Translation guide
The English word "rigorous" covers several distinct meanings: strict and demanding (as in rules or training), thorough and meticulous (as in research or analysis), and harsh or severe (as in climate or conditions). Each meaning has different natural Japanese equivalents.
Describing something that is very strict, requiring great effort or precision, often in an official or formal context.
The most common and versatile word for 'strict' or 'rigorous'. Used for rules, training, discipline, and conditions.
This school has rigorous rules.
He endured rigorous training.
Emphasizes strict adherence to rules or standards, often in a formal or official sense. Slightly more formal than 厳しい.
Rigorous quality control is carried out.
Means 'rigorous' in the sense of being precise, exact, and leaving no room for error. Often used for methods, definitions, or procedures.
Please follow the rigorous procedure.
Describing work or study that is done very carefully, completely, and with great attention to detail.
Means 'thorough' or 'exhaustive'. The best fit for rigorous research, investigation, or preparation.
They conducted a rigorous investigation.
Rigorous preparation is necessary.
Means 'meticulous' or 'detailed'. Often used for plans, analysis, or scrutiny.
Rigorous analysis is required.
Means 'elaborate' or 'intricate'. Used for very detailed and precise work, often in technical or artistic contexts.
It is based on rigorous calculations.
Describing physical conditions that are very difficult, uncomfortable, or extreme.
厳しい (kibishii) is the most general and can be used for strict people, rules, training, and harsh conditions. 厳格な (genkaku na) is more formal and emphasizes strict adherence to rules or standards, often in institutional contexts. 厳密な (genmitsu na) focuses on precision and exactness, used for methods, definitions, and procedures.
The teacher is rigorous but fair.
Meet rigorous screening criteria.
Rigorously speaking, that is not correct.
Avoid directly translating 'rigorous' as a single Japanese word in all contexts. The appropriate term depends heavily on whether you mean strict, thorough, or harsh. Using 厳しい for a 'rigorous analysis' may sound unnatural; 徹底的な or 綿密な is better.
The course requires rigorous study.
Here 'rigorous' means thorough and demanding, so 徹底的な fits well.
Survive in a rigorous natural environment.