breakable, brittle, brittle as glass, capricious, changeable, cheap-jack, cobwebby, corruptible, crackable, crisp, crispy, crumbly, crushable, dainty, deciduous, decrepit, delicate, delicately weak, dying, effeminate, ephemeral, evanescent, fading, feeble, fickle, fissile, fleeting, flimsy, flitting, fly-by-night, flying, fracturable, frail, frangible, friable, fugacious, fugitive, gimcrack, gimcracky, gossamery, impermanent, impetuous, impulsive, inconstant, infirm, insubstantial, jerry-built, jerry, lacerable, light, lightweight, momentary, mortal, mutable, namby-pamby, nondurable, nonpermanent, papery, passing, pasteboardy, perishable, puny, rickety, scissile, shaky, shatterable, shattery, shivery, short-lived, short, sissified, sleazy, slight, splintery, tacky, temporal, temporary, tenuous, thin, transient, transitive, transitory, undurable, unenduring, unsound, unstable, unsubstantial, volatile, vulnerable, weak, weakly, wispy, womanish