noun
A somewhat literary or formal word for words expressing resentment, complaint, or reproach. Not an everyday term for a simple complaint.
彼の怨語は、長年の不満が積もったものだった。
His words of resentment were the accumulation of years of discontent.
その手紙には、恨みつらみの怨語が綴られていた。
The letter was filled with bitter complaints and reproaches.