Meaning of the Sanskrit Word: yattah

  yattaḥ—is engaged    SB 7.15.30, SB 9.2.3
  yattaḥ—engaged    SB 3.25.26
  yattaḥ—being on guard    SB 4.10.22
  yattāḥ—with great endeavor    SB 8.7.1
  yattāḥ—endeavor    SB 8.7.5
  yattāḥ—engaged with full attention and effort    SB 8.10.1
  yattāḥ—with great care    SB 10.11.31-32

Can't find any compound Sanskrit words containing yattah.