adj. 25B6; adjective
mules are sterile : INFERTILE, unable to reproduce/conceive, unable to have children/young; technical infecund; archaic barren.
sterile desert : UNPRODUCTIVE, infertile, unfruitful, uncultivatable, barren.
a sterile debate : POINTLESS, unproductive, unfruitful, unrewarding, useless, unprofitable, profitless, futile, vain, idle; archaic bootless.
sterile academicism : UNIMAGINATIVE, uninspired, uninspiring, unoriginal, stale, lifeless, musty.
sterile conditions : ASEPTIC, sterilized, germ-free, antiseptic, disinfected; uncontaminated, unpolluted, pure, clean; sanitary, hygienic.
fertile, productive, creative, original, septic.