uninfusive
/ˌʌnɪnˈfjuːsɪv, ˌʌnɪnˈfjuːsɪv, ˈʌnɪnˈfjuːsɪv/Definitions
1. adjective
Lacking or showing a lack of infusiveness; not contributing to or promoting the infusion of new ideas or enthusiasm.
“The uninfusive atmosphere of the office stifled creativity and innovation among employees.”