1. Not to be placated or appeased or moved by entreaty
   - grim, inexorable, relentless, stern, unforgiving, unrelenting

See also: implacable

• palpitating
• palpitation
• palpus
• palsgrave
• palsied
• palsy
• palsy-walsy
• palter
• paltering
• paltriness
• paltry
• paludal
• palustrine
• paly
• palynology
• pam
• Pamelor
• Pamir Mountains
• Pamlico
• pampas
• pampas grass
• pamper
• pamperer
• pampering
• pampero