Translation of "relentlessly" into Portuguese

Black holes seem gruesome in one way, because they relentlessly obliterate anything that comes their way.

Buracos negros parecem horríveis de certa forma, pois eles destroem implacavelmente o que aparece à frente.

But that only demonstrates how stealthily and yet relentlessly it has spread.

Mas isso apenas demonstra quão furtiva, mas incessantemente, ela se tem disseminado.