KanjiJLPT N2
Obscure

dark, foolish

Mnemonic

The sun has not yet risen. Everything is obscure—shrouded in eerie pre-dawn murk where nothing has shape or certainty. You stumble blindly through fog, reaching for things you can't name. Only when the sun climbs will the obscure world finally reveal itself.
Additional thoughts
The kanji literally embeds 'sun' and 'not yet' together—the sun not yet shining is the most natural image of obscurity. Picture that gray, shapeless moment before dawn when you can't tell a tree from a person.
Quick recall
The sun has not yet risen, leaving everything obscure.

Details

The keyword for 昧 is obscure. This kanji conveys the sense of something being dim, unclear, or difficult to perceive, much like the faint light before dawn when the sun has not yet fully risen. It carries connotations of ignorance, darkness, or ambiguity, suggesting a state where understanding or visibility is clouded. It often appears in compounds related to being unenlightened or vague about something.
On'yomi
まい、ばい
Kun'yomi
くら.い、むさぼ.る