Grief
Distress, Sorrow
noun
This is a single kanji with an い on the end, but wait! It's not an adjective, it's just a noun (tricky, tricky). The kanji means grief, so this word means grief or distress.
うれい
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You learned this reading when you learned 憂える. Remember that and you'll remember this!
彼女は、憂いを帯びた顔でこちらを見ていた。
She looked this way with a sorrowful expression on her face.