a. 1. Destitute of pity; hard-hearted; merciless; as, a pitilessmaster; pitiless elements. [ 1913 Webster ]
2. Exciting no pity; as, a pitiless condition. [ 1913 Webster ]
-- Pit"i*less*ly, adv. -- Pit"i*less*ness, n. [ 1913 Webster ]