Unmoved by appeals for sympathy or forgiveness; insensible to the distresses of others; destitute of tenderness; unrelenting; unyielding; unpitying; as, a prey to relentless despotism.
For this the avenging power employs his darts,..
Thus will persist, relentless in his ire.
-- Re*lent"less*ly, adv. -- Re*lent"less*ness, n.
© Webster 1913.