quauparavant
Quauparavant is not recognized as a standard word in French. It does not appear in major dictionaries, and linguistic references treat it as a non-attested form. In most cases where it appears, it is regarded as a typographical error, a misreading by optical character recognition (OCR), or a mistaken blending of elements.
If one intends to express the idea of something happening before another event, the correct form would
In practice, encountering quauparavant should prompt a correction to either aucesse or qu’avant depending on context.
Overall, quauparavant lacks attested usage, defined meaning, or grammatical status in standard French. It is best