On the Evolution of Old Portuguese Indefinite jamais ‘Never’—Syntactic Analyzability and Polarity

In Contemporary Portuguese, jamais ‘never’ is a negative indefinite that encodes temporal semantics and belongs to the set of strong Negative Polarity Items, being able to express negation on its own, in preverbal position. However, it originates from the merger of two non-negative Latin adverbs—iam ‘now/already’ and magis ‘more’—starting as a construction and later becoming an independent lexical unit, with different features. Data from the 13th century onwards shows that, in early attestations, jamais still preserved some level of internal syntactic analyzability, with the possibility of inverse word order and interpolation. The meaning of the construction could be obtained through the sum of its parts, but its occurrence in negative and modal contexts shows that its interpretation became context-sensitive. This independence was eventually lost, with the emergence of an intrinsic negative reading, favoured in negative contexts through the combination of inchoative and comparative strategies in no-longer expressions.