to challenge someone to prove their authority or claim
誰かにその権威や主張を証明するように挑戦する (dareka ni sono ken'i ya shuchou o shoumei suru you ni chousen suru)
"She called his bluff when he threatened to quit."
"彼女は彼のブラフを呼んだ、彼が辞めると脅したとき。" (kanojo wa **kare no burafu o yonda**, kare ga yameru to odoshita toki)
I swear or promise sincerely.
someone told me something secretly
to remain loyal to your values, even in difficult situations
to reach a stage of maturity or full potential
hoping for good luck or a good result
to achieve great fame or success
