IPA: /nɒnˈpəʊləraɪzəbl/
KK: /nɑnˈpoʊlərɪzəbl/
This term describes something that cannot be polarized, meaning it does not have distinct positive and negative ends or charges.
Water is a nonpolarizable substance, which means it does not separate into positive and negative poles.
Nonpolarizable → It is formed from "non-" (meaning not) and "polarizable" (from "polar" meaning having poles or distinct regions and "-izable" meaning capable of being). The word "nonpolarizable" means not capable of being polarized or not having distinct poles.
Think of 'not' ('non-') being added to 'capable of having poles' ('polarizable') — that's why nonpolarizable means it cannot have distinct poles.