tāḿ tathā yadu-vīreṇa
bhujyamānāḿ hata-vratām
hetubhir lakṣayāḿ cakrur
āpṛītāḿ duravacchadaiḥ
bhaṭā āvedayāḿ cakrū
rājaḿs te duhitur vayam
viceṣṭitaḿ lakṣayāma
kanyāyāḥ kula-dūṣaṇam
tam -- her; tatha -- thus; yadu-virena -- by the hero of the Yadus; bhujyamanam -- being enjoyed; hata -- broken; vratam -- whose (virgin) vow; hetubhih -- by symptoms; lakshayam cakruh -- they ascertained; a-pritam -- who was extremely happy; duravacchadaih -- impossible to disguise; bhatah -- the female guards; avedayam cakruh -- announced; rajan -- O King; te -- your; duhituh -- of the daughter; vayam -- we; viceshtitam -- improper behavior; lakshayamah -- have noted; kanyayah -- of an unmarried girl; kula -- the family; dushanam -- besmirching.
Srila Visvanatha Cakravarti has defined the word bhatah as "female guards," whereas Jiva Gosvami defines it as "eunuchs and others." Grammatically, the word can function both ways.
The guards feared that if Banasura found out about Usha's activities from some other source, he would severely punish them, and thus they personally informed him that his young daughter was no longer innocent.