What is the meaning of brutal?

adjective

• Of persons or their actions. ( able or disposed to inflict pain or suffering)
  • usage: "a barbarous crime"; "brutal beatings"; "cruel tortures"; "Stalin's roughshod treatment of the kulaks"; "a savage slap"; "vicious kicks"
  • synonyms: barbarous, cruel, fell, roughshod, savage, vicious
• Harsh.
  • usage: "the brutal summer sun"; "a brutal winter"
  • synonyms: unrelenting
• Resembling a beast; showing lack of human sensibility.
  • usage: "beastly desires"; "a bestial nature"; "brute force"; "a dull and brutish man"; "bestial treatment of prisoners"
  • synonyms: beastly, bestial, brute, brutish
• Disagreeably direct and precise.
  • usage: "he spoke with brutal honesty"