fortitude

The word "fortitude" has a direct lineage from the Latin noun fortitudo, which itself is built from the adjective fortis (strong) and the abstract noun-forming suffix -tudo. This Latin term was adopted into Middle English via Old French, carrying the core sense of "moral strength." The logic of the word is beautifully literal: the state or quality (-tude) of being strong (fort-). Over time, this physical notion of strength evolved specifically to denote the inner, mental strength required to endure hardship or danger with resilience and courage.

Structure: fort (strong) + itude (state or quality) The morpheme "fort" originates from Latin fortis, meaning "strong." The morpheme "itude" is a suffix from Latin -tudo, used to form nouns indicating a state, condition, or quality.