The word(s) "thinkest" appears 2 time(s) in 2 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) Or thinkest thou that most of them listen or understand? They are only like cattle;- nay, they are worse astray in Path.

(2) Thou seest the mountains and thinkest them firmly fixed: but they shall pass away as the clouds pass away: (such is) the artistry of Allah, who disposes of all things in perfect order: for he is well acquainted with all that ye do.