deregulation; removal (easing) of (official) restrictions; relaxation of regulations
easing of tensions; detente; thaw
palliative; mitigative; lenitive; alleviant; obtundent; anesthetic
palliative medicine; palliative therapy; palliative treatment; palliative care
partial relaxation; partial easing
alleviation of congestion (esp. traffic)
unprecedented monetary easing (by the Bank of Japan in 2013)