Origin of epistemicfrom Classical Greek epist?m? (see epistemology) + -ic
An example of something epistemic is a journey to find new sources of truth.
Origin of epistemicFrom Greek epistēmē knowledge ; see epistemology .
Philosophers usually differentiate the meanings of “epistemic” and “epistemological”. They generally use “epistemic” in the sense “of or relating to knowledge or cognition” and use “epistemological” in the sense “of or relating to epistemology”. 
From Ancient Greek epistēmikós, from ἐπιστήμη (epistēmē, “science, knowledge”).