Meaning of “obscure” - Learner’s Dictionary

obscure

verb [ T ] uk us /əbˈskjʊər/
NOT SEE

to prevent something from being seen or heard:

[ often passive ] The moon was partially obscured by clouds.
NOT UNDERSTAND

to make something difficult to understand:

He deliberately obscured details of his career in the army.

(Definition of “obscure verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)