IPA: /ˌaɪsɛnˈtrɒpɪk/
KK: /ɪˈsɛntrəpɪk/
Describing a process or condition where the entropy remains constant, meaning there is no change in the level of disorder or randomness in a system.
In thermodynamics, an isentropic process is often idealized to simplify calculations.
Isentropic → It is formed from "iso-" (meaning equal) and "tropikos" (from Greek, meaning turning or change). The term describes a process that occurs without any change in entropy, hence maintaining equal entropy throughout the process.
Think of 'equal' ('iso-') and 'change' ('tropikos') to remember that isentropic refers to a process where entropy remains constant.