surging

/S ER1 JH IH0 NG/
verb
  1. 1

    To rush, flood, or increase suddenly.

    โ€œToaster sales surged last year.โ€

  2. 2

    To accelerate forwards, particularly suddenly.

    โ€œA ship surges forwards, sways sideways and heaves up.โ€

  3. 3

    To slack off a line.

noun
  1. 1

    The action or an instance of a surge.

Source: https://en.wiktionary.org/wiki/surge, https://en.wiktionary.org/wiki/surging