corpse : a dead body , usually of person

* The corpse was laid to rest in the vacant coffin.

* When given all the data on the corpse , Columbo was able to solve the murder. 

* An oath of revenge was sworn over the corpse by his relatives.

conceal : hide 

 * The money was so cleverly concealed that we were forced to abandon our search for it.

* Tris could not conceal his love for Gloria.

* Count Dracula concealed the corpse in his castle. 

Dismal : dark and depressing

* When the weather is so dismal , i sometimes stay in bed all day.

* I am unaccustomed to this dismal climate.

* As the dismal reports of the election came in , the senator's friends tactfully made no mention of them.