IPA: /nɒnˈliːθəl/
KK: /nɑnˈliːθəl/
Referring to something that is not capable of causing death or serious injury.
The police used nonlethal methods to control the crowd during the protest.
Nonlethal → It is formed from "non-" (meaning not) and "lethal" (from Latin "letalis", meaning deadly). The word "nonlethal" means not deadly or not causing death.
Think of 'not' ('non-') and 'deadly' ('lethal') to remember that 'nonlethal' refers to something that does not cause death.