Meaning of the Sanskrit Word: ayasah

  ayaśaḥ—infamy    Bg 10.4-5
  ayasaḥ—iron    SB 1.8.10
  āyāsaḥ—difficulty    SB 3.30.16
  āyāsaḥ—endeavor    SB 7.6.19

Can't find any compound Sanskrit words containing ayasah.