How Do You Spell REACTIVENESSES?
Pronunciation: [ɹɪˈaktɪvnəsɪz] (IPA) 
The spelling of the word "reactivenesses" can be explained using IPA phonetic transcription. The first syllable is pronounced /ri-/ (as in "ree"), followed by the vowel sound /æ/ (as in "cat"). The second syllable starts with the consonant sound /k/ and includes the vowel sound /ti/ (as in "tea"). The third syllable is pronounced /və/ (as in "uh"), followed by the consonant sound /n/ and the vowel sound /ɪ/ (as in "it"). The final syllable ends with the consonant sound /s/, making the complete word pronounced as ri-æk-ti-və-nes-i-zəz.
