IPA: /sʌbˌtɪlɪˈzeɪʃən/
KK: /sʌbˌtɪlɪˈzeɪʃən/
The process of making something more refined or subtle, often involving a high degree of delicacy or precision.
The subtilization of the material improved its quality and effectiveness in the experiment.
Subtilization is formed from "subtilis" (meaning fine or delicate) and the suffix "-ization" (meaning the process of making or becoming). The word refers to the process of making something finer or more delicate.
Think of 'fine' or 'delicate' ('subtilis') and remember that 'subtilization' means the process of making something finer.