worsener

Noun

 * 1) One who or that which worsens (things), makes things worse.
 * 2)  One who or that which worsens (internally), becomes worse, deteriorates in condition.
 * 1)  One who or that which worsens (internally), becomes worse, deteriorates in condition.
 * 1)  One who or that which worsens (internally), becomes worse, deteriorates in condition.