IPA: /sʌbˈliːθəl/
KK: /sʌbˈliːθəl/
Referring to something that is not deadly but can still cause harm or adverse effects, often used in the context of doses or exposures that are less than lethal.
The researchers tested sublethal doses of the chemical to observe its effects on the environment.
Sublethal is formed from "sub-" (meaning under or below) and "lethal" (from Greek "lethalis", meaning deadly). The word describes something that is below the level of causing death, indicating a non-fatal effect.
Think of 'sub-' meaning 'under' and 'lethal' meaning 'deadly' — so sublethal refers to something that is not deadly or below the level of causing death.