Meaning of the Sanskrit Word: amamsata

  amaṁsata—began to think.    SB 1.7.31
  amaṁsata—could think.    SB 3.2.9
  amaṁsata—considered    SB 8.2.29
  amaṁsata—thought    SB 10.6.5-6

Can't find any compound Sanskrit words containing amamsata.