The spelling of the word "out blooming" can be tricky because of the silent letter "g" in the final syllable. It is pronounced [aʊt bluːmɪŋ], with the stress on the second syllable. The "ou" represents the diphthong /aʊ/, which is a combination of the sounds /a/ (as in "cat") and /ʊ/ (as in "put"). The "bloom" part is straightforward, but the final "ing" is pronounced as /ɪŋ/, with the "g" being silent. So the correct spelling is "out blooming," but the pronunciation may not be immediately obvious.
There appears to be a misunderstanding or miscommunication regarding the term "out blooming". The phrase "out blooming" is not a commonly used or recognized term in the English language. It is possible that you may have accidentally combined two separate terms: "out" and "blooming".
The word "out" is a preposition or adverb that commonly denotes movement away or beyond something, or an action or state that is completed or finished.
The word "blooming" is an adjective that means flourishing, blossoming, or full of life, often used to describe flowers in bloom.
Without any context or further information, it is difficult to determine a specific etymology for "out blooming" because it is not a widely recognized term.