Intensiverem

Intensiverem is a verbal form that appears in discussions of Portuguese grammar as the third-person plural form of a verb in the future subjunctive mood. It is most often described in grammars as related to the hypothetical verb intensiver, meaning to make something more intense, and connected to the more common verb intensificar.

In standard modern Portuguese, the future subjunctive endings follow patterns that depend on the verb class. For regular -ar verbs, the form in the third person plural of the future subjunctive is typically -arem (as in chegarem), while -er and -ir verbs use -erem or -irem (as in quiserem, abrirem). Because intensivar is an -ar verb, its regular future subjunctive would normally be intensivarem, not intensiverem. As a result, intensiverem is rarely attested in contemporary usage and may appear in historical texts, some dialects, or as a nonstandard variant.

The form can occur in subordinate clauses introduced by conditions or time, such as in sentences like Se eles intensiverem o esforço, os resultados poderão melhorar. In prescriptive modern usage, writers would more commonly use the form intensivarem or rephrase the sentence to avoid the nonstandard based form. Thus intensiverem serves as an example of how verb formation rules interact with diachronic change and regional variation in Portuguese.