have it

/HH AE1 V IH0 T/
verb
  1. 1

    To understand or believe.

    โ€œConventional wisdom has it that heat rises, but in fact heat diffuses: hot air rises.โ€

  2. 2

    (often in the negative) To accept (an excuse, a behavior, etc).

    โ€œHe tried to make excuses but she wouldn't have it / was not having it / was having none of it.โ€

Source: https://en.wiktionary.org/wiki/have%20it