思い切り， 思いきり， おもいきり
1. to one's heart's content, as much as one wants, as hard as one can, with all one's strength, to the best of one's ability, to the utmost, with determination, hard, heavily
2. resolution, decisiveness, determination, resignation
尽心、尽意、尽力、全力、全力以赴、下定决心；决断、果断、决心、辞职