Fetching details from the dictionary...

uncertain; indefinite; vague; ambiguous; equivocal; dubious; doubtful; non-committal
彼の説明はあやふやで理解できなかった。
His explanation was vague and I couldn't understand.
あやふやな記憶を頼りに道を探した。
I searched for the road relying on vague memories.
返事があやふやだったので確認した。
The answer was unclear so I confirmed.