to carry to extremes; to go to the end of something; to reach the peak of something (e.g. luxury, hardships, etc); to be extremely (e.g. busy); to exhaust completely; to have nothing left (e.g. to say)
Examples (9 in total)
相手の反応をみきわめるためだ。
It is to ascertain the other party's reaction.
まず問題の質をみきわめよう。
First, let's figure out the nature of the problem.