Menu toggle
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

界

Reading

Kana: かい
Romaji: kai
Kana
Romaji

Definitions

noun
1

kingdom

(Biology term)
2

erathem (rock layer corresponding to the era in which it was deposited)

(Geology, etc. term)
3

partition of land

suf
4

the world of (some category)

Kanji

界
Reading: カイ
Meanings: world, boundary

Example Sentences

新(しん)世界(せかい)だからな。
➥It's a whole new ball of wax.
Full Entry➤
世界(せかい)を一周(いっしゅう)したい。
➥I want to travel around the world.
Full Entry➤
私(わたし)の我慢(がまん)も限界(げんかい)だ。
➥My patience gave out.
Full Entry➤
世界(せかい)最長(さいちょう)なのです。
➥It is the longest in the world.
Full Entry➤
世界(せかい)は昔(むかし)とは違(ちが)う。
➥The world is not what it used to be.
Full Entry➤
もう我慢(がまん)の限界(げんかい)だ！
➥This is the last straw!
Full Entry➤
Find More

境

界

Readings

Kana: さかい、きょう
Romaji: sakai, kyō
Kana
Romaji

Definitions

noun
1

border; boundary

Note: usu. さかい
2

turning point; watershed

Note: often ...を境に
3

area; region; spot; space; environment

Note: usu. きょう
4

psychological state; mental state

Note: usu. きょう
5

cognitive object; something perceptible by the sense organs or mind

(Buddhist term)

Kanji

境
Readings: キョウ、 ケイ、 さかい
Meanings: boundary, border, region
界
Reading: カイ
Meanings: world, boundary

Example Sentences

音楽(おんがく)に国境(こっきょう)なし。
➥Music is universal.
Full Entry➤
彼(かれ)は環境(かんきょう)に順応(じゅんのう)した。
➥He adapted himself to circumstances.
Full Entry➤
彼(かれ)は生死(せいし)の境(さかい)をさ迷(まよ)った。
➥He hovered between life and death.
Full Entry➤
彼(かれ)は苦境(くきょう)に会(あ)った。
➥He was very badly situated.
Full Entry➤
逆境(ぎゃっきょう)で人(ひと)は成長(せいちょう)する。
➥Adversity is the best school.
Full Entry➤
彼(かれ)は国境(こっきょう)を越(こ)えて行(い)った。
➥He passed across the border.
Full Entry➤
Find More