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 young: most young.

adj. Most recently begun or formed.

"But my youngest is a picky reader, in much the same way that he's a picky eater, and he had lost most of his interest in recreational reading until we gave him Jim's books a couple months ago."