To change one's straightforward or principled approach to a more flexible, often less principled one; to smooth off one's edges and become adaptable or opportunistic.
他初入职场时棱角分明，但经过几年的磨练，也渐渐学会了斫方为圆，不再那么固执己见。
When he first entered the workplace, he was very rigid, but after a few years of tempering, he gradually learned to smooth off his edges and was no longer so opinionated.
Era:
Ancient
Frequency:
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