infirm, adj. 1. feeble, enfeebled, weak, frail, fragile, debilitated, drooping, withered, wasted, worn, worn-out, enervated, exhausted, helpless, powerless, played out, spent; decrepit, impotent, failing, senile, anile, old-womanish, puerile, childish, in one's second childhood, dotty, Inf. crocked, Inf cracked; unhealthy, in poor health, in declining health, on the decline, reduced to skin and bones, skeleton-like; ailing, sick, sickly, Inf. poorly, ill, unwell, indisposed, Inf under the weather, Inf. off one's feed, taken ill, Inf. laid up, Inf. in a bad way, in danger, Inf. laid low, prostrate; confined, bedridden, invalided, Brit, in hospital; crippled, lame, halt; hurt, injured, suffering, wounded.
2. unstable, faltering, trembling, doddering, wavering, vacillating, inconstant, fickle, unsteadfast, changeable, irresolute; undetermined, indecisive, undecided, pliable, easily led, gullible, naive.
3. rickety, tottering, unsteady, unsubstantial, shaky, precarious, insecure, unsound; rotten, decayed, seedy, deteriorated, the worse for wear, on its last legs, tumbledown, jerry-built, flimsy.
infirmary, n. 1. hospital, hospice, clinic, sick bay, school or college hospital; sanitarium, sanatorium, nursing home, rest home, home, asylum, Fr. maison de sante; pest house, lazaretto, leprosarium; health resort, spa, watering place, baths, springs, hot springs, thermae, pump room.
2. dispensary, dispensatory, pharmacy, Brit, chemist's shop, apothecary's shop, drugstore.
infirmity, n. 1. ailment, malady, disorder, complaint, indisposition, infection, affliction, illness, loss of health; sickness, disease, contagious or infectious disease, epidemic, pestilence, pest, plague.
2. impairment, defect, debility, debilitation, disability; senility, anility, Inf. second childhood, decrepitude, decline, decay, deterioration; weakness, delicacy, delicate health, invalidism; breakdown, collapse.
3. moral weakness, moral failing, immorality, fault, foible, defect, imperfection, flaw; lapse, relapse, backsliding, recidivism, recrudescence; perversion, reversion, retrogression, deterioration; apostasy, fall, fall from grace.
infix, v. 1. fix, fasten, drive in, rivet, ingrain; implant, infuse, introduce, inject, insinuate.
2. instill, inoculate, inculcate, indoctrinate; train, teach, imprint, impress.
inflame, v. 1. fire, ignite, kindle, torch, deflagrate, burn, burn up or down, set aflame or alight or on fire, set fire to, put to the torch, Obs. accend, Obs. flagrate.
2. incite, provoke, actuate, poke, prod, prick, goad, prompt, spur; encourage, urge, abet, egg on, put up to; instigate, look for trouble, Inf start something; foment, agitate, suscitate, excite, impassion, intensify, arouse, rouse, madden, craze, stir up, work up, wind up, whip up, lash into a fury, Inf psych up, heat up, fire up, enflame, enkindle, touch off, ignite the spark, stir the embers, fan the fire, add fuel to the flame or fire, fuel.
3. stimulate, animate, reanimate, whet, invigorate, motivate, inspirit, inspire, galvanize, electrify, energize, activate, vivify, rally, revive, enliven, liven up, pep up, awaken, wake up, waken, shake up, jolt, jog; impel, induce, compel, constrain, move, press, drive, stir, fillip; elicit, evoke, call forth, summon up,
inflammability, n. 1. combustibility, combustibleness, inflammableness, flammableness, flammability, deflagrability, ignitability or ignitibility, Rare, accend-ibility.