mist, haze, fog
靄 centers on atmospheric obscurity: a mist, haze, or fog that softens and blurs the landscape.
靄 combines 雨 (rain, weather) with 謁, which likely contributes the sound アイ and may relate to the idea of something obscured or unclear.
Rain 雨 falls over a complex scene below, like a misty haze that blurs everything. The dense lower component 謁 looks like a landscape softened by fog.
For アイ, picture an eye trying to see through the mist: eye -> アイ, and the haze makes everything hard to see clearly.