IPA: /fʌnˈdʒɪsɪdəl/
KK: /fʌnˈdʒɪsədl/
Describing something that can kill or control fungi.
The farmer used a fungicidal spray to protect his crops from mold.
Fungicidal → It is formed from "fungus" (from Latin *fungus*, meaning mushroom or fungus) and "-cidal" (from Latin *caedere*, meaning to kill). The word "fungicidal" means capable of killing fungi.
Think of 'fungus' as the type of organism being targeted and '-cidal' meaning to kill — that's why fungicidal refers to something that kills fungi.
No commonly confused words.