椭

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ellipse

Sound it out + =

Formation & memory

Break the character into parts you already know.

Phono-semantic compound (形声字)

木 meaning “wood” + 陏 sound ( suí )

Components 木陏

The most common words first — learning a character in context makes it stick.

Word	Pinyin	Meaning
椭圆形办公室	Tuǒ yuán xíng Bàn gōng shì	Oval Office
参考椭球体	cān kǎo tuǒ qiú tǐ	reference ellipsoid (geodesy)
椭圆曲线	tuǒ yuán qū xiàn	(math.) elliptic curve
椭圆积分	tuǒ yuán jī fēn	(math.) elliptic integral
椭圆函数	tuǒ yuán hán shù	(math.) elliptic function
椭圆机	tuǒ yuán jī	elliptical machine (exercise)
椭圆形	tuǒ yuán xíng	oval
椭球	tuǒ qiú	(math.) ellipsoid
椭圆	tuǒ yuán	oval; ellipse; elliptic

Characters sharing the sound component 陏 — compare how they read.

Character	Pinyin	Meaning
陏 sound part	suí	to accompany, to follow; to listen to; to submit to
堕	duò	to drop, to fall, to sink; degenerate