勾
be bent, slope, capture
Readings
On'yomi
- コウ
- ク
Kun'yomi
- かぎ
- ま.がる
Nanori
- まがり
Meaning
勾 centers on a curved or hooked shape that can catch or slope. Being bent is the core idea, from which sloping and capturing naturally follow.
Most common words using 勾
- 勾留こうりゅう
detention pending trial; confinement; custody
- 勾配こうばいN1
slope; incline; gradient; grade; pitch
- 勾玉まがたま
magatama; comma-shaped bead from prehistoric Japan, usually made of jade
- 上り勾配のぼりこうばい
uphill grade; upgrade
- 下り勾配くだりこうばい
downhill grade; downgrade
- 八尺瓊勾玉やさかにのまがたま
large jewel; string of jewels
- 共役勾配法きょうやくこうばいほう
contragradient method; conjugate gradient method; CG method
- 勾引こういん
arrest; custody; apprehending; abduction
- 勾引しかどわかし
kidnapper
- 勾引すかどわす
to kidnap
- 勾引状こういんじょう
summons; warrant of arrest
- 勾留状こうりゅうじょう
detention warrant
- 勾股弦こうこげん
three sides of right triangle (minor cathetus, major cathetus and hypotenuse)
- 勾股弦の定理こうこげんのていり
Pythagorean theorem
- 勾配天井こうばいてんじょう
sloping ceiling
- 勾配消失問題こうばいしょうしつもんだい
vanishing gradient problem (in machine learning)
- 急勾配きゅうこうばい
steep slope
- 抜き勾配ぬきこうばい
draft angle
- 空間勾配くうかんこうばい
spatial gradient
- 非線形共役勾配法ひせんけいきょうやくこうばいほう
nonlinear conjugate gradient method
Study
Etymology
勾 is thought to depict a bent or hooked shape, with 勹 representing a wrapping curve and 厶 possibly a bent object inside. The exact historical development is uncertain.
Meaning mnemonic
The outer 勹 wraps around like a hook, and the inner 厶 looks like a bent arm. Together they form a shape that is bent, sloping, and ready to capture something.
Reading mnemonic
For コウ, imagine a coat hook bent into a curve: coat -> コウ, and the hook captures your jacket on the slope.