unexcitable
1. [ adjective ] not easily excited
Examples:

"an unexcitable temperament"

Related terms: excitable steady
Similar spelling:   unsuitable
  ungetatable
  unexcited
  unstable
  unsuitableness
  unactable
  unquotable
  unexciting
  unsuitably
  unstableness
  unagitated
  unexcitingly
  unestablished