Source : WordNet®

wan
     adj 1: (of light) lacking in intensity or brightness; dim or
            feeble; "the pale light of a half moon"; "a pale sun";
            "the late afternoon light coming through the el tracks
            fell in pale oblongs on the street"; "a pallid sky";
            "the pale (or wan) stars"; "the wan light of dawn"
            [syn: {pale}, {pallid}]
     2: abnormally deficient in color as suggesting physical or
        emotional distress; "the pallid face of the invalid"; "her
        wan face suddenly flushed" [syn: {pale}, {pallid}]
     3: lacking vitality as from weariness or illness or
        unhappiness; "a wan smile"
     [also: {wanning}, {wanned}, {wannest}, {wanner}]

wan
     v : become pale and sickly
     [also: {wanning}, {wanned}, {wannest}, {wanner}]

wanning
     See {wan}