mettle, renege, prodigy

mettle: 패기, 결단력, 승부수
​ability and ​determination when ​competing or doing something ​difficult:
The ​team ​showed/​proved ​its mettle in the ​final round.
The ​real ​test of her ​political mettle came in the May ​elections
bravery and ​determination:
The ​climb to the ​summit in a ​blizzard would ​test ​their mettle.
------------------------------------------------------------------------------renege (on) : (협정 또는 계약을) 위반하다 (/riˈneɡ/)
to ​fail to ​keep a ​promise or an ​agreement, etc.:
If you renege on the ​deal now, I'll ​fight you in the ​courts.
He reneged on his ​offer.
Once the ​highest ​bid is ​accepted, a ​seller can be ​sued for ​breach of ​contract if they renege.
The ​retailer ​claimed that the ​cosmetics ​company reneged on a ​deal to ​produce a ​range of beauty ​products for them.-----------------------------------------------------------------------------
prodigy : 신동