This site will be taken down March 31st, 2026.

This was not an easy decision to make. For the last couple years, I have been struggling to find motivation for this site and to keep up with basic maintenance and security updates. With the rise of AI and more sophisticated tools, the usefulness of sites like this is questionable and traffic has nose-dived. I just don't have it in me to keep doing this. Thank you all for 10 years of support!

Zach

Word

理想

りそう
ideal; ideals
Word

定理

ていり
theorem; proposition
Word

理念

りねん
(Platonic) ideal (of how things ought to be, e.g. human rights); foundational principle; idea; conception (e.g. of the university); doctrine; ideology
Word

倫理

りんり
ethics; morals
Word

真理

しんり
truth
Word

理学

りがく
physical science (e.g. chemistry, biology, etc.); physics; lixue (Song-era Chinese philosophy); philosophy
Word

合理

ごうり
rational
Word

理科

りか
science
Word

無理

むり
unreasonable; unnatural; unjustifiable; impossible; forcible; forced; compulsory; excessive (work, etc.); immoderate; to work too hard; to try too hard; irrational
Word

病理

びょうり
pathology