Webster's Revised Unabridged Dictionary · 1913

Fortitude

Fortitude , noun

[Latin fortitudo, from fortis strong. See Fort.]

1.
Power to resist attack; strength; firmness. [Obsolete]
The fortitude of the place is best known to you. — Shakespeare
2.
That strength or firmness of mind which enables a person to encounter danger with coolness and courage, or to bear pain or adversity without murmuring, depression, or despondency; passive courage; resolute endurance; firmness in confronting or bearing up against danger or enduring trouble.
Extolling patience as the truest fortitude. — Milton
Fortitude is the guard and support of the other virtues. — Locke