tat - that; varṇayitum - to describe; ārabdhāḥ - beginning; smarantyaḥ - remembering; kṛṣṇa-ceṣṭitam - the activities of Kṛṣṇa; na aśakan - they were incapable; smara-vegena - by the force of Cupid; vikṣipta - agitated; manasaḥ - whose minds; nṛpa - O King Parīkṣit.

The cowherd girls began to speak about Kṛṣṇa, but when they remembered His activities, O King, the power of Cupid disturbed their minds, and thus they could not speak.