IPA: /ˌeɪbækˈtɪəriəl/
KK: /ˌeɪbækˈtɪrɪəl/
Not having any bacteria or not related to bacteria.
The abacterial environment in the laboratory ensures that no bacteria can contaminate the experiments.
Abacterial → It is formed from "a-" (meaning without) and "bacterium" (from Greek "bakterion", meaning rod or staff, referring to bacteria). The word "abacterial" means without bacteria or free from bacteria.
Think of 'a-' meaning without, and 'bacterium' referring to bacteria — so abacterial means free from bacteria.