adjective
disrespectful
dis-rih-SPEKT-ful/ˌdɪsrɪˈspektfl/
Showing a lack of respect or proper regard.
The young adult interrupts the older speaker in a disrespectful way.

Etymology
Respectful describes respect expressed in conduct, especially outward courtesy. Dis- negates that quality, so disrespectful points to behavior that fails to show someone proper regard.
In context
it's considered disrespectful to the body to delay a burial and so normally burial is not delayed unless it's for the Dignity of the corpse