unstimulating

/ʌnˈstɪmjəˌleɪtɪŋ/
adjective
  1. Not interesting, exciting, or mentally engaging; dull.
    • The lecture was so unstimulating that several students fell asleep.
    • He found the job unstimulating and started looking for new challenges.
    • An unstimulating environment can make it hard to focus.
What does "unstimulating" mean? | whatsthatwordmean | whatsthatwordmean