The word "furiousnesses" may seem intimidating at first glance, but its spelling is actually quite straightforward when broken down phonetically. The first syllable is pronounced "fyur," with the "u" sounding as it would in "fur." The second syllable is pronounced "ee," with a long "e" sound. The third syllable is "us," pronounced "uhs." Finally, the fourth syllable ends with "ess," pronounced "ehs." All together, the word is pronounced as "fyur-ee-uhs-ehs." It means the state or quality of being extremely angry or enraged.