What semantic notions underlie 吳 (shouting) with 夨 (man with tilted head)?
This question is actually a good example of why Ancient Chinese scribes cannot keep on drawing pictures to represent words. They can avoid similar-looking or similar-meaning character components to a degree to distinguish between different words, but at some stage, it will become easier to incorporate a component which refers to the sound of a word rather purely relying on the meaning of a word.

Person (人) + mouth (口) has already been used for the character 「兄」.

商甲甲2292合集20014今楷　

Front view of a person (大, no tilted head) + mouth (口) has already been used for the following character:

商甲後2.18.7合集3028隸定