wan 
(wŏn)
(wŏn)adj. wan·ner, wan·nest
1. Unnaturally pale, as from physical or emotional distress.
2. Suggestive or indicative of weariness, illness, or unhappiness; melancholy: a wan expression.
intr.v. wanned, wan·ning, wans
To become pale.
[Middle English, pale, gloomy, from Old English wann, gloomy, dark.]
wanly adv.
wanness n.