ardhah
para-ardhaḥ — half of the duration of life; SB 3.11.34
ardhaḥ — half; SB 4.16.17
kṣaṇa-ardhaḥ — lasting only half of one moment; SB 11.2.30
kṣaṇa-ardhaḥ — lasting half a moment; CC Madhya 22.85