Permanecerá means "will remain" or "will stay". It's a beautiful and slightly more formal verb than simply "ficar" (to stay), adding a touch of poetic elegance to the lyrics.
In the song, Tim Maia uses it to describe how things will remain sad or incomplete without his loved one. He sings, "Tire uma estrela do céu, e ele permanecerá triste" (Take a star from the sky, and it will remain sad), emphasizing the lasting impact of absence.
Tim Maia recorded "É Por Você Que Vivo" in 1971, and it opens mid-argument, trying to call a truce: "Não, não vamos mais brigar" ("No, let's not fight anymore"). He asks to see the damage for himself — "Pouse os seus olhos nos meus / E veja como estão tristes" ("Rest your eyes on mine / And see how sad they are").
The middle of the song runs on small, matched images: a star pulled down from the sky, a flower picked from the garden, a heart sent away from his own — each one turns sad or breaks the moment it's separated from where it belongs. That builds toward the hook, which closes the song sung seven times in a row: "É por você que eu vivo" ("It's for you that I live").
Tim Maia, born Sebastião Rodrigues Maia in Rio de Janeiro in 1942, was the singer who gave Brazil its own brand of soul. He started out as a teenage drummer and singer in the Tijuca neighbourhood, spent a few restless years in the United States soaking up rhythm and blues, then came home and poured all of it into Portuguese.
His self-titled 1970 debut made him a national star almost overnight, carried by classics such as "Azul da Cor do Mar" and "Primavera". Over the next three decades he practically invented samba soul and Brazilian funk, took a famous mystical detour with the "Racional" albums, and became as legendary for his huge, unpredictable personality as for his voice. He died in 1998 at the age of 55, and his songs are still everywhere in Brazil, from beach radios to film soundtracks.