godan verb (-su), transitive verb
do everything possible; leave nothing undone; exhaust all efforts
Emphasizes carrying out an action to the fullest extent, leaving no stone unturned. Often used with verbs of effort or preparation.
できることはし尽くした。
I did everything I could.
準備はし尽くしたので、あとは本番を待
We've made every possible preparation, so now we just wait for the actual event.