Wiktionary
grasp the nettle
vb. (context idiomatic English) To act boldly, especially when there are short-term adverse consequences.
Usage examples of "grasp the nettle".
If he was willing to grasp the nettle, then the cloud warrior who had already demonstrated his skills in the building of flying-horses should be given a new project.
He was extremely vexed that he had patiently bided his time for so many years only to learn that the Solomonic Gold had been lost to Malabar pirates, and had decided to grasp the nettle, as it were, and go to Hindoostan himself.
Nobody in authority seems willing to grasp the nettle for once and all.
I decided that now was the time to grasp the nettle, so I went on, 'Loving is sweet and good.