deep adjective

• difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge

  "the professor's lectures were so abstruse that students tended to avoid them"

  "a deep metaphysical theory"

  "some recondite problem in historiography"
  [to be deep] -mì èmì
• relatively deep or strong; affecting one deeply

  "a deep breath"

  "a deep sigh"

  "deep concentration"

  "deep emotion"

  "a deep trance"

  "in a deep sleep"
  [to be deep] -mì èmì