The spelling of the word "impulsivenesses" may cause confusion, but it can be broken down phonetically as: [ɪmˈpʌlsɪvnəsɪz]. The first syllable "im" is followed by "pul" which has a short "u" sound, and "sive" with a long "i" sound. The next syllable "ness" is pronounced with a short "e" sound, and the final syllables "es" with a soft "s" sound. This word refers to the tendency to act without thinking, which can lead to spontaneous and sometimes reckless behavior.