Dolorous means full of sorrow. A dolorous sigh, dolorous music, a dolorous expression.
It is literary and slightly heavy, which is why it is often used with a touch of humour about somebody being very sad indeed. The Latin behind it is dolor, pain, which is where dole and doleful come from too.
1adjectivedolorousFull of sorrow.
“The dolorous music at the funeral made everyone weep.”
dolorous is a quality.
Latin dolorosus comes from dolor, pain or grief.
Proto-Indo-European
*delh₁-
Latin
dolōrōsus — painful
Old French
dolerous
Middle English
dolorous
English, today
dolorous
From Middle English dolorous, from Old French dolerous (modern French douloureux), from Latin dolōrōsus (“painful”), from Latin dolor. a doublet of dolorose.
Etymology from Wiktionary, CC BY-SA
Practised in A Song of Ice and Fire