non-fragile

adjective

1. easily broken, shattered, or damaged; delicate; brittle; frail: a fragile ceramic container; a very fragile alliance.
2. vulnerably delicate, as in appearance: She has a fragile beauty.
3. lacking in substance or force; flimsy: a fragile excuse.

adjective

1. able to be broken easily
2. in a weakened physical state
3. delicate; lighta fragile touch
4. slight; tenuousa fragile link with the past

adj.1510s, “liable to sin, morally weak;” c.1600, “liable to break;” a back-formation from fragility, or else from Middle French fragile (14c.), from Latin fragilis (see fragility). Transferred sense of “frail” (of persons) is from 1858.