IPA: /ɪnˈvoʊkeɪʃən/
KK: /ɪnˈvoʊkeɪʃən/
A formal request or appeal to a higher power, often through prayer or a special formula, used in religious or spiritual contexts.
The priest began the service with an invocation to bless the congregation.
Invocation → It is formed from "in-" (meaning upon or in) and "vocare" (meaning to call). The word refers to the act of calling upon a deity or spirit for assistance or inspiration.
Think of 'calling upon' someone ('vocare') to help you, which is what invocation means.