bisavô

Etymology
From.

Noun

 * 1) great-grandfather, male great-grandparent

Usage notes
Bisavô has two plural forms, bisavôs and bisavós. The former (os bisavôs) means exclusively a group of two or more men (cf. English great-grandfathers), the latter (os bisavós) is used for a group of both men and women (cf. English great-grandparents). Both are masculine nouns. The plural of bisavó (great-grandmother) is a regular feminine noun (as bisavós) and means great-grandmothers. This is one of the few Portuguese nouns that have a tripartite plural inflection, the others being, , , and other derived terms.