to become clouded or darkened (e.g. light or the sky being obscured by clouds or shadow).
午後になって太陽が雲に陰ってしまった。
In the afternoon the sun became obscured by clouds.
窓辺の花が日陰に入って少し陰って見える。
The flowers by the window are in the shade and look a little dark.
遠くの山頂が霧で陰って見えた。
The distant mountain peak looked obscured by fog.
to darken (of a person's face); for someone's expression to become sullen or gloomy.
冗談を言われて彼の顔が陰った。
When the joke was made, his face clouded over.
悪い知らせを聞いて彼女の表情が陰ってしまった。
She heard the bad news and her expression went dark.
to worsen or become gloomy; for a situation or atmosphere to deteriorate or turn bleak.
問題が表面化して職場の雰囲気が陰ってきた。
The problem came to light and the workplace atmosphere turned gloomy.
最近、景気が陰ってきたと感じる。
Lately I feel the economy has started to take a turn for the worse.