obscure

adjective (obscurer, obscurest)

• 1not discovered or known about; uncertain:his origins and parentage are obscure
• not important or well known:a relatively obscure actor

• 2not clearly expressed or easily understood:obscure references to Proust
• hard to make out or define; vague:grey and obscure on the horizon rose a low island I feel an obscure resentment

verb

• keep from being seen; conceal:grey clouds obscure the sun
• make unclear and difficult to understand:the debate has become obscured by conflicting ideological perspectives
• keep from being known:none of this should obscure the skill and perseverance of the workers