-gnosis

1.
a combining form meaning “knowledge,” used in the formation of compound words:
prognosis.
Origin
< Latin -gnōsis < Greek; see gnosis
British Dictionary definitions for -gnosis

-gnosis

combining form
1.
(esp in medicine) recognition or knowledge: prognosis, diagnosis
Derived Forms
-gnostic, combining_form:in_adjective
Word Origin
via Latin from Greek: gnosis