HSK 7-9
惯性
guànxìng名
(physics) inertia; (fig.) force of habit; tendency to do things in the accustomed way; habitual
汽车因惯性继续向前滑行。
Qì chē yīn guàn xìng jì xù xiàng qián huá xíng.
The car continued sliding forward because of inertia.
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Appears across levels (7-9) in the HSK 3.0 word list.