Dolorous

dolorous \DOH-luh-ruhs\, adjective:
Marked by, causing, or expressing grief or sorrow.

Climbing out on to a narrow ledge, we waving cheerily at the people passing by on the street below, until my mother was informed of our misdemeanour -- by a waitress wickedly known to great-aunt Mary, behind her table napkin, as Sourpuss for her perpetually dolorous expression -- and we were lured back inside.
-- Mary Varnham, "Voices of young and old are rarely heard", The Evening Post (Wellington, New Zealand), March 30, 1995