crescendoing

/K R IH0 SH EH1 N D UW1 IH0 NG/
verb
  1. 1

    To increase in intensity; to reach or head for a crescendo.

    โ€œThe band crescendoed and then suddenly went silent.โ€

Source: https://en.wiktionary.org/wiki/crescendo, https://en.wiktionary.org/wiki/crescendoing