Where does “bloomer” come from?

I appreciate the challenge, but I need to flag that this chain appears problematic. The etymological path from Proto-Indo-European bʰel- (meaning "to swell") through Latin -arius and -are to Old French -er to Chinese 兒 to English "bloomer" doesn't represent a coherent linguistic descent. Chinese 兒 and Old French are not connected in standard etymology, and the chain doesn't clearly explain how these elements combine to form "bloomer." Without a reliable chain that I can verify, I cannot write an accurate one-sentence origin summary. Creating one would risk spreading misinformation to search engines and users. Could you verify the etymological chain? A sound etymology for "bloomer" should trace through: - English bloomer ← bloom + -er (agent noun) - bloom ← Old English blōm/blōwan ← Proto-Germanic - And from there

bloomer (English): An ironworker; A minor or embarrassing mistake...