IPA: /bækˈtɪr.i.əl/
KK: /bækˈtɪr.ɪ.əl/
Connected to or caused by tiny living organisms that can only be seen with a microscope, often responsible for diseases.
The doctor prescribed antibiotics to treat the bacterial infection.
Bacterial → It is formed from "bacterium" (from Greek "bakterion", meaning small staff or rod) and the suffix "-al" (meaning pertaining to). The word "bacterial" refers to something that is related to or characteristic of bacteria.
Think of 'bacterium' as a small rod-like organism, and remember that 'bacterial' means something related to these tiny organisms.