to suddenly become angry
enfadarse de repente (en-fa-dar-se de re-pen-te)
"Try not to lose your cool during the argument."
"Trata de no perder los estribos durante la discusión." (tra-ta de no per-der los es-tri-bos du-ran-te la dis-cu-sion)
to continue doing something well
To fit perfectly.
to achieve something one has long desired
to suddenly become very angry or emotional
to behave confidently and proudly
to stop being involved in or responsible for something