to watch to the end
to ascertain; to determine; to get to the bottom of; to make sure of
to know thoroughly; to obtain a deep understanding of
相手の実力を見極める。
Ascertain the opponent's ability.
状況をよく見極めよう。
Let's carefully determine the situation.
真偽を見極めるのは難しい。
It's difficult to determine authenticity.