IPA: /nɒnˈsɛdɪˌmɛntəbl/
KK: /nɑnˈsɛdɪˌmɛntəbl/
This word describes something that cannot settle or form sediment.
The solution was nonsedimentable, remaining clear and mixed without any particles settling at the bottom.
Nonsedimentable → It is formed from "non-" (meaning not), "sediment" (from Latin "sedimentum", meaning something that settles), and "-able" (meaning capable of). The word describes something that is not capable of being settled or deposited as sediment.
Think of 'not' ('non-') being able to 'settle' ('sediment') — that's why nonsedimentable means something that cannot settle.