(intransitive) To strive to one's utmost; to give one's all in an endeavour, at sport, etc. / (intransitive, informal) To be excellent. / Used other than figuratively or idiomatically: see go, hard.

present participle of go hard

To lead to someone suffering; to place someone in difficulty or danger.

(often imperative, usually sports) To face a challenge by making a bold, superior effort, lest one give up and forgo the opportunity.