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

けい、わたり
diameter
Word

途、路、径
みち
road; street; way; path; course; route; lane; distance; ways (e.g. "a long ways"); the way (of proper conduct, etc.); one's way; morals; teachings (esp. Confucian or Buddhist); dogma; field (of medicine, etc.); subject; way; method; means
Word

直径

直経
ちょっけい
diameter
Word

口径

こうけい
aperture; bore; calibre; caliber
Word

半径

はんけい
radius
Word

内径

ないけい
bore; inside diameter
Word

小道

小路、小径、小逕
こみち、しょうけい
path; lane; small diameter; small radius
Word

径間

渡り間
けいかん、わたりま
distance between two points; distance between opposite supports of arch, bridge; span
Word

長径

ちょうけい
major axis
Word

行動半径

こうどうはんけい
radius of action; sphere of activity