转捩

to turn

zhuǎi = zhu + ai3

see 轉文|转文[zhuai3 wen2]

zhuǎn = zhu + an3

to turn / to change direction / to transfer / to forward (mail) / (Internet) to share (sb else's content)

转 = 专 + 车 : In anthill, Julian Giant Squid drives a car to transfer a drink from the bar to the scientist's table.

zhuàn = zhu + an4

to revolve / to turn / to circle about / to walk about / classifier for revolutions (per minute etc): revs, rpm / classifier for repeated actions

liè = li + e4

tear / twist

turning point

转捩 currently does not appear in any sentence.