harm

(noun) any physical damage to the body caused by violence or accident or fracture etc.. Synonyms: injury, hurt, trauma.

(noun) the occurrence of a change for the worse. Synonyms: damage, impairment.

(noun) the act of damaging something or someone. Synonyms: damage, hurt, scathe.

(verb) cause or do harm to. Example: "These pills won't harm your system."