What does «inexcusable» mean in Spanish?

That it cannot be excused, justified or excused.

Examples of use in Spanish: "tus inasistencias son inexcusables".

"cometió un error inexcusable".

"su comportamiento es inexcusable".
That cannot be avoided or left undone.

Examples of use in Spanish: "tengo una obligación inexcusable".

"una visita inexcusable".