Adjective
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deficient in originality or creativity
lacking powers of invention
"a sterile ideology lacking in originality"
"unimaginative development of a musical theme"
"uninspired writing"
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free of or using methods to keep free of pathological microorganisms
"a sterile operating area"
"aseptic surgical instruments"
"aseptic surgical techniques"
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incapable of reproducing
"an infertile couple"