infernal russian

• а́дский

  hellish, infernal, frightful, awful, terrible

• а́довый

  hellish, infernal

  awful, terrible, dreadful, horrendous

• а́ццкий

  hellish, infernal, awful, terrible, horrendous, godawful (slang), insane (slang)

• инферна́льный

  infernal, hellish, demonic

• а́дски

  infernally, frightfully, terribly, awfully