The word "severalizes" is spelled with three syllables: sev-er-al-iz-es. The initial "s" is pronounced as /s/ followed by the short vowel sound /ɛ/ in the second syllable. The third syllable starts with the consonant cluster /r/ and the vowel sound /əl/ followed by /aɪz/ in the last syllable. The word means to distinguish or separate into several parts. While somewhat uncommon, this word can be useful in technical or academic writing where specificity is important.
There is no word "severalizes" in the English language. The term "severalize" does exist, but it is not a widely known or used word. Therefore, it is difficult to pinpoint a specific etymology for it.