From Latin 'fortitūdō' (strength) — literally 'inner strength,' kin to 'fort,' 'force,' 'comfort,' and 'pianoforte.'
Courage in pain or adversity; mental and emotional strength in facing difficulty.
From Latin "fortitūdō" ("strength, firmness, bravery"), from "fortis" ("strong, brave, firm"), from PIE *bʰerǵʰ- ("high, elevated") via an intermediate sense of "strong, fortified" (that which stands high is defensible). The PIE root *bʰerǵʰ- also produced Sanskrit "bṛhánt-" ("high, lofty"), Avestan "bərəzant-" ("high"), Celtic *brigant- ("high, exalted," yielding the goddess name Brigantia and the tribal name Brigantes), and Germanic *burgz ("fortified height," yielding English "borough," "burg," German "Burg," and the -bury/-burgh place-name suffix). Latin "fortis" generated an enormous
'Fortitude,' 'fort,' 'fortress,' 'force,' 'comfort,' and 'effort' all come from Latin 'fortis' (strong). Fortitude is strength of character. A fort is a strong place. Force is applied strength. Comfort is 'being strong together' (com + fortis). Effort is 'putting strength out' (ex + fortis). Even '