fragile (adj.) Look up fragile at Dictionary.com
1510s, "liable to sin, morally weak;" c.1600, "liable to break;" a back-formation from fragility, or else from Middle French fragile (Old French fragele, 14c.), from Latin fragilis "easily broken," from root of frangere "to break" (see fraction). Transferred sense of "of frail constitution" (of persons) is from 1858.