II.55 tataḥ parama vaśyatā indriyāṇāḿ

tataḥ: then, from that

parama: the highest

vaśyatā: subdued, controlled, governed

indriyāṇāḿ: of the senses

Pratyahara results in the absolute control of the sense organs.  (Source: Light on the Yoga Sutras of Patanjali, B.K.S. Iyengar)

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Pratyahara is the fifth limb of Patanjali’s eight-limbed path of practice. It is the process of withdrawing the senses (indriyas) from objects of distraction, desire, or aversion, both outside of and within the mind. This prepares us for equanimous concentration (dharana) and meditation (dhyana). Like tributaries moving toward a greater body of water, the busy, individual trajectories of the eyes, ears, nose, mouth, and skin are redirected for the purpose of reflection and insight. 

— Melanie Jane Parker