Meaning of the Sanskrit Word: nirmalam

  nirmalam—crystal clear    SB 8.2.25
  nirmalam—uncontaminated by the effects of speculative philosophical research or fruitive activity    Madhya 19.170
  nirmalam—without material contamination.    SB 7.7.15
  nirmalam—purified    Bg 14.16

Can't find any compound Sanskrit words containing nirmalam.