A strike or blow that leads to death, especially a coup de grace. / Something that prevents the completion, or ends the existence, of a project etc.; a fatal setback.

Any of various beetles of the family Anobiidae, especially Xestobium rufovillosum, that bore into wood and make a tapping sound.

undying or immortal / Of a work of art, literature, etc., guaranteed not to be lost or forgotten due to its importance or conspicuous excellence.

Appearing as though dead, or on the verge of death. / Deadly, fatal, causing death. / Extreme.

In a way that resembles death. / Extremely, dreadfully.

plural of deathbed

(obsolete) The state or quality of being deathy.

Resembling or characteristic of death. / (obsolete) Deadly.

A vigil beside a dying person / One who guards a condemned person before execution. / A deathwatch beetle.

plural of deathblow