unclear; vague; imprecise; indistinct
Describes something that lacks clarity, precision, or definiteness. Can refer to statements, plans, memories, images, or criteria. Often used in formal or critical contexts.
His explanation was unclear, and I couldn't really understand what he wanted to say.
The plan was not approved because its objectives were vague.
This photo is out of focus, and the subject is indistinct.
Compound of 不 (fu, 'not') + 明確 (meikaku, 'clear, precise'). The base 明確 is from 明 (mei, 'bright, clear') and 確 (kaku, 'certain, firm').