biàn​zhì HSK7

spoil

变质 (變質) biàn​zhì
spoil verb
to go bad or go off, especially referring to food or organic matter

The leftovers have gone bad because of the heat.

degenerate verb
to undergo a change in nature or character for the worse; to deteriorate

We must be wary of decadent ideas causing moral degradation.

metamorphism verb
the geological process of change in the structure of rock through pressure or heat

Metamorphism has formed many unique minerals.

Frequency

Movie subtitles
2.18 per million appears in 1% of films
Written text
5.97 per million

Details

HSK 2.0
Level 6
HSK 3.0
Level 7

Sources

Definitions
CC-CEDICT