The word "re activenesses" is a plural form of "reactiveness", which refers to the ability or tendency to react to stimuli. The first syllable is pronounced with a long "e" sound, as in "bee". The second syllable is pronounced with a short "a" sound, as in "cat". The third syllable is pronounced with a schwa sound, as in the sound at the beginning of the word "about". The final syllable is pronounced with the suffix "-es", indicating pluralization. Overall, the IPA transcription for this word is /riːækˈtɪvnəsɪz/.
The word "re activenesses" does not have a clear etymology because it is not a commonly used or recognized word. It appears to be a combination of multiple suffixes added to the base word "reactive", resulting in a complex and unusual formation. The suffix "-ness" is added to turn the adjective "reactive" into a noun, indicating the quality or state of being reactive. The prefix "re-" suggests repetition or reoccurrence. However, the use of multiple suffixes together in this way is not typical in English. It is possible that "re activenesses" is a coined word or an erroneous form.