vulnerability

Latin vulnus meant a physical wound, and Roman writers used it plainly. Cicero wrote of wounds inflicted in battle; Virgil described Aeneas's wounds in the Aeneid. From vulnus, Latin formed vulnerare (to wound) and then vulnerabilis (capable of being wounded). The suffix -abilis expressed capacity, so vulnerabilis meant simply: able to be hurt.

Medieval Latin preserved vulnerabilis in medical and theological writing. Thomas Aquinas in the 13th century distinguished mortal bodies from resurrected ones, arguing that glorified flesh was impassible, not vulnerabilis. The word traveled from Roman law into scholastic philosophy, accumulating theological weight along the way.

English borrowed vulnerable directly in the early 17th century. The earliest recorded English use dates to 1605, in a text on military fortification describing positions exposed to enemy fire. The abstract noun vulnerability followed in 1767, used first in political writing about nations susceptible to attack. For two centuries, the word meant almost exclusively: capable of physical or strategic harm.

Brené Brown's 2010 TED talk changed the word's emotional register in ways that would have puzzled any Roman soldier. Brown argued that vulnerability was not weakness but the birthplace of love, belonging, and courage, and her framing reached tens of millions of viewers. The shift was real: vulnerability now names an emotional posture as often as a strategic liability, and the Latin wound-word carries both meanings at once.