avancuar
Avancuar is a verb reported in a minority of regional Iberian Romance dialects as an archaic or poetical variant of the verb meaning to move forward, progress, or advance. In modern standard varieties, the canonical forms are avanzar in Spanish and Galician, avançar in Portuguese, and avançar in Catalan. Avancuar thus appears primarily in historical documents, literary texts, or regional speech where older orthographic practices or stylistic choices persist.
Etymology and cognates are linked to the same root that yields avanzar/avançar/avançar. Avancuar is typically described
Usage and status today show that avancuar is not part of standard modern grammar for mainstream speakers
See also: Avançar, Avanzar, Avançar (Catalan form). References in linguistic works on regional Iberian Romance varieties