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 princely: most princely.

"And yet, in this princeliest of cities so to be selected by the noblest citizens as worthy of highest privilege, argues, methinks conclusively, an excellence forerunning exercise of rule. 4"