弹簧 (tánhuáng): spring (coiled metal)

Measure Word

一根弹簧 gēn

Zhè ge tánhuáng shīqù le tánxìng.

This spring has lost its elasticity.

Chuángdiàn lǐ yǒu hěn duō tánhuáng.

There are many springs inside the mattress.

memory

弹 (bounce/spring) + 簧 (reed of an instrument) = a coiled spring. Think of the bouncy 弹 character doing the springing.

弹 dàn

簧 huáng