Yoga Sutra - Sādhana Pada 2.8
दुःखानुशयी द्वेषः ॥८॥
duḥkha-anuśayī dveṣaḥ ||8||
Aversion is clinging to dissatisfaction.
Aversion stems from [experiences] of pain.
Vyāsa explains aversion, dveṣaḥ, the fourth kleśa, in a parallel manner to the previous kleśa of attachment: The feeling of resistance, anger, frustration, and resentment toward pain and its causes, by one who remembers past experiences of similar pain, is aversion. The commentators state that this sūtra is to be understood along the same lines as the last one: Aversion, dveṣaḥ, after all, is the flip side of the same coin as attachment. When we resist or resent something, or are angry or frustrated over something, it is because of a remembrance that this thing caused us pain in the past.
avidyā (f.) a(not) + vidyā, wisdom, knowledge, from √vid (know)
kśetram (n. nom. sg.) origin, field, ground; from √kṣi (posses)
uttareṣāṃ (m.) of the others
prasupta (m.) dormant, fallen, asleep, inactive, latent; pra(before,forward + supta from √svap (sleep)
tanu (m.) attenuated, lessened, diminished; from √tan (stretch, spin out)
vicchinna (m.) suppressed, overpowered, interrupted; vi (assunder, away) + chinna, from √chid (cut)
udārāṇām (m. gen. pl.) fully active or engaged, aroused; ud (up, forth, out) + āra, from √ṛ (go)