A rare or archaic term relating to grievance or complaint; the act of grieving or expressing sorrow.
From Old French 'grief' or Latin 'gravis' (heavy), with suffix '-ation' added; related to concepts of burden and weight of sorrow.
This word is so old and rare that it barely appears in modern English, but it reveals how 'grief' and 'grievance' share a root meaning 'something heavy weighing on you'—literally and emotionally.
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