IPA: /ˌhɒmɪˈsaɪdəl/
KK: /hɑˈmɪsəˌdæl/
Relating to or capable of causing the killing of another person.
The detective was concerned about the suspect's homicidal tendencies.
Homicidal → It is formed from "homo" (from Latin *hominis*, meaning man or human) and "-cidal" (from Latin *caedere*, meaning to kill). The word "homicidal" refers to the act of killing a human being.
Think of 'homo' meaning human and '-cidal' meaning to kill — this helps you remember that 'homicidal' relates to the act of killing a human.