Fragile
来自Big Physics
late 15th century (in the sense ‘morally weak’): from Latin fragilis, from frangere ‘to break’. The sense ‘liable to break’ dates from the mid 16th century.
wiktionary
Borrowed from Middle French fragile, from Latin fragilis, formed on frag-, the root of frangere(“to break”). Cognate fraction, fracture and doublet of frail.
etymonline
fragile (adj.)
1510s, "liable to sin, morally weak;" c. 1600, "liable to break;" a back-formation from fragility, or else from French fragile (Old French fragele, 14c.), from Latin fragilis "easily broken," from root of frangere "to break" (from PIE root *bhreg- "to break"). Transferred sense of "of frail constitution" (of persons) is from 1858.
