还原

还原	huán yuán	to restore to the original state / to reconstruct (an event) / reduction (chemistry)
还	Huán	surname Huan
还	hái	still / still in progress / still more / yet / even more / in addition / fairly / passably (good) / as early as / even / also / else
还	huán	to pay back / to return
原	Yuán	surname Yuan / (Japanese surname) Hara
原	yuán	former / original / primary / raw / level / cause / source