uninventive
1. [ adjective ] deficient in originality or creativity; lacking powers of invention:i "a sterile ideology lacking in originality"
Synonyms: unimaginative uninspired sterile
Examples:

"unimaginative development of a musical theme" "uninspired writing"

Related terms: uncreative
Similar spelling:   uninvited
  uninfected
  uninvitedly
  uninvolved