IPA: /ˈfɔːtrəs/
KK: /ˈfɔrtrəs/
A strong building or place that is protected against attacks, often used for military purposes.
The soldiers took refuge in the fortress during the battle.
**Fortress** → It is formed from "fortis" (meaning strong) and the suffix "-ess" (used to denote a place). The word "fortress" refers to a strong place or building designed for defense.
Think of a 'strong' ('fortis') place where people can be safe — that's what a fortress is.