Instability
来自Big Physics
late Middle English: from French instabilité, from Latin instabilitas, from instabilis, from in- ‘not’ + stabilis (see stable1).
wiktionary
From Middle French instabilité, from Latin instabilitas
Morphologically in- + stability.
etymonline
instability (n.)
early 15c., from Old French instabilité "inconstancy" (15c.) or directly from Latin instabilitatem (nominative instabilitas) "unsteadiness," from instabilis "unsteady, not firm, inconstant, fickle," from in- "not, opposite of" (see in- (1)) + stabilis (see stable (adj.)).
