原理|げんりgenri[1]atamadaka (head-high)

1. nounprinciple; theory; fundamental truth
   誰だれもがその考かんがえを原理げんり的てきには認みとめるだろう。↗

   Everyone will accept that idea in principle.

• Synonym原則げんそくNeutralBasic rules or general principles, as in 「原則として禁止」; 「原理」 is the fundamental reasoning behind how something works.
• Synonym理論りろんNeutralA systematic theory built up from principles; 「原理」 is the most fundamental reasoning underlying it.
• SynonymプリンシプルNeutralLoanword for a principle or creed, often one's personal convictions; in everyday speech 「原則」 or 「信念」 is the natural choice.
• Related道理どうりNeutralReason or common sense, as in 「道理に合わない」; 「原理」 leans toward scientific principles.
• RelatedルールNeutralLoanword for rules or regulations; 「原理」 is the underlying reasoning, not a set rule.
• Related学説がくせつNeutralA doctrine advocated by a particular scholar; 「原理」 is a truth that holds universally.
• RelatedセオリーNeutralLoanword for theory or an established way of doing things, as in 「勝利のセオリー」; 「原理」 is a fundamental truth.
• Related公理こうりNeutralA mathematics and logic term for a premise accepted without proof; 「原理」 is broader in scope.
• Related定理ていりNeutralA mathematical term for a proposition that has been proven; 「原理」 is the fundamental reasoning behind things.
• Antonym応用おうようNeutralAntonym that pairs with 「原理」 as practice against theory; putting knowledge to practical use.

Use 「原理」 for the fundamental truth behind how something works or holds. Pick 「原則」 for basic rules, 「理論」 for systematic theory, 「道理」 for reason and sense, 「公理」/「定理」 for math, 「ルール」 for rules, 「学説」 for scholarly doctrines, 「セオリー」 for established practice, and 「プリンシプル」 for personal creeds; 「応用」 is its practical counterpart.

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

1. 多おおくのものごとに当あてはまる、根本こんぽんとなる理論りろん。プリンシプル。