HSK 7-9
回归
huíguī动
to return to; to retreat; regression (statistics)
退役多年后他回归赛场。
Tuì yì duō nián hòu tā huí guī sài chǎng.
He returned to competition after years in retirement.
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Appears across levels (7-9) in the HSK 3.0 word list.