How to sign: free of or using methods to keep free of pathological microorganisms
"a sterile operating area"; "aseptic surgical instruments"; "aseptic surgical techniques";
Similiar / Same: aseptic
How to sign: deficient in originality or creativity; lacking powers of invention
"a sterile ideology lacking in originality"; "unimaginative development of a musical theme"; "uninspired writing";
Similiar / Same: unimaginative, uninventive, uninspired