“Dignity” of orders

In Paul Turner's Blog by Paul Turner

Q:  In the election of the candidates in the ordination rite, what is the Latin word that is translated as “worthy” in English?   What are the shades of meaning here? In English, “worthy” has a Pelagian ring to it….
A:  It’s dignos.  There are other places where the rite speaks of the “dignity” of orders.