Sentence:  And while we stood beside the fount, and watch'd / Or seem'd to watch the dancing bubble, approach'd / Melissa, tinged with <WSD>wan</WSD> from lack of sleep, / Or sorrow, and glowing round her dewy eyes / The circled Iris of a night of tears ; [...] 
Meaning of the word marked with <WSD> tags:  The quality of being wan; wanness.