HSK 7-9
较劲
jiàojìn动
to match one's strength with; to compete; more competitive; to set oneself against sb
两名选手暗中较劲提高速度。
Liǎng míng xuǎn shǒu àn zhōng jiào jìn tí gāo sù dù.
The two competitors quietly tried to outdo each other and increased their speed.
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Appears across levels (7-9) in the HSK 3.0 word list.