IPA: //maɪˌkroʊbɪˈsaɪdəl//
KK: /maɪˌkroʊbɪˈsaɪdəl/
Relating to a substance that kills or inhibits the growth of microorganisms, especially harmful ones.
The new cleaning product is microbicidal, effectively eliminating bacteria and viruses on surfaces.
Microbicidal → It is formed from "micro-" (from Greek "mikros", meaning small) and "cidal" (from Latin "caedere", meaning to kill). The word "microbicidal" refers to the ability to kill small organisms, particularly microbes.
Think of 'small' ('micro-') and 'to kill' ('cidal') — this helps you remember that microbicidal means something that kills small organisms.
No commonly confused words.