coffin

This word carries a heavy, somber weight, evoking images of finality, grief, and the physical reality of death. It is a literal object of mourning and is rarely used in lighthearted contexts unless the intent is macabre or darkly comedic. While "casket" is often used in American English to sound more gentle or euphemistic, "coffin" remains the more stark and traditional term, often associated with the classic six-sided tapered shape.