There are several types of absolute constructions (acs) in English. Among these, this article investigates the so-called what-with ac, which has not received much attention in the study of English grammar. This article considers the grammatical properties of the construction from a synchronic as well as a diachronic perspective, using much more representative and robust corpora than previous studies. Based on corpus data drawn from historical corpora such as COHA (Corpus of Historical American English, 400 million words), the article addresses questions about changes in the construction's syntactic, semantic and pragmatic properties. In addition, the article provides a Construction Grammar perspective, which supports previous research in arguing that the construction is undergoing the processes of grammatical constructionalization.