Pronunciation: [wˌɒt ˈʌndə] (IPA) 
The correct spelling of the phrase "what under" can be a bit confusing, as there are a few variations that could be used depending on the context. Generally, the transcription would be something like /wʌt ˈʌndər/. The "t" sound is important to include before the "u" in "under," as it distinguishes it from "wander" or "one dur." Keeping this in mind can help ensure that your spelling is accurate and easily understood by others.
I apologize, but "what under" does not appear to be a widely recognized phrase or term with a specific dictionary definition. It may be a combination of the words "what" and "under," but without further context or clarification, it is difficult to provide an accurate definition.
Individually, "what" is a pronoun that typically seeks information or clarification about something or somebody. It is often used to introduce a question about a specific thing or situation.
"Under," on the other hand, is a preposition that denotes a position or location below or beneath something. It can also indicate a state of being controlled by someone or something, or being subject to certain conditions or rules.
However, when combined together as "what under," it could potentially be a colloquial or regional phrase that is not widely known. If you can provide more context or a specific usage example, I would be happy to help further.
