What does «inútil» mean in Spanish?

That it is not useful, does not serve or does not produce benefit.

Examples of use in Spanish: "Ya pasó demasiado tiempo, sus disculpas serán inútiles".

"Es inútil que lo intentes".
The one who is incapable of doing anything useful. Lazy, Slothful.

Examples of use in Spanish: "Eres un verdadero inútil, no haces nada". Aquí usado como sustantivo.

"Son unos empleados inútiles, no sirven para nada". Aquí como adjetivo.
One who has become unable to move or work. Applying it to a person may be considered derogatory.

Examples of use in Spanish: "El brazo quedó inútil luego del accidente".

"Tras el accidente, él quedó inútil". (despectivo)
Considered unfit for military service.

Examples of use in Spanish: "Se le ha declarado inútil para el servicio militar".