Ikhtiyaar means influence or authority/control over something or someone.

Here are some couplets with Ikhtiyaar. The first one is from the ghazal din guzar gaya written by Fana Nizami Kanpuri:

mere kabz mein kainaat hai
main hoon aap ke ikhtiyaar mein

I have the entire universe in my possession
(Yet) I am under your influence

Another one, written by Shahryar..

ye kis maqaam par hayaat mujhko leke aagayi
na bas khushi pe hai jahaan na gham pe ikhtiyar hai

What is this place that life has brought me to, I have no right over my happiness, nor any control over my sorrows.