fiendish

Adjective Satellite

• extremely evil or cruel; expressive of cruelty or befitting hell
  • "a fiendish despot"

Adj

• Sinister; evil; like a fiend.
• Very difficult.

Adjective

• Extremely wicked, cruel, or clever; devilish.

Examples

• His FIENDISH strategy of blocking all premium squares frustrated his opponent immensely.

Synonyms

demonic, diabolic, diabolical, hellish, infernal, satanic, unholy, conniving

Anagrams of fiendish