durdarsah
durdarśaḥ — difficult to be seen; SB 1.6.21
durdarśaḥ — not easily seen; SB 3.22.6
durdarśaḥ — very difficult to perceive; SB 4.8.35
durdarśaḥ — rarely seen; SB 10.58.11
durdarśāḥ — impossible to see; SB 10.69.38