Verse Text
tasmād aniyatādhārāḥ sapta sāmayikā ime |
sahajā api līyante baliṣṭhena tiraskṛtāḥ ||45||
Translation
Therefore, these seven emotional states manifest for a short time in a person, and are not fixed in any particular person. [Note: The primary rati is fixed in a particular person according to his inclination, though sometimes it may become subdued or parārtha.] Even though these seven emotions manifest spontaneously, they disappear by being covered by contrary bhāvas arising from the primary rati.
Purport (Jiva Goswami)
Sahajā api means spontaneous or natural. They are later covered by a contrary bhāva (baliṣṭhena) arising from rati and thus disappear.
Purport (Nectar of Devotion)
NoD 33: Indirect Expressions of Ecstatic Love