This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. superlative form of wan: most wan.

"He tucked the long front pieces of hair behind his ears and put on his spectacles of smoked glass, which he wore even in the dim of morning, his eyes apparently too weak for the wannest form of light."