IPA: /ʌnˈhaɪdrəˌlaɪzd/
KK: /ʌnˈhaɪdrəˌlaɪzd/
Not broken down by the process of hydrolysis, which is a chemical reaction involving water that typically breaks down compounds.
The sample contained unhydrolyzed proteins that were still intact.
Unhydrolyzed → It is formed from "un-" (meaning not) and "hydrolyzed" (from "hydrolyze", which comes from "hydro-" meaning water and "lyze" meaning to break down). The word means not broken down by water, indicating a substance that has not undergone hydrolysis.
Think of something that has not been 'broken down' ('lyze') by 'water' ('hydro-') — that's why unhydrolyzed means it hasn't been affected by water.