have it in one

ویژگی پنهانی که به دلایلی بروز نکرده یه دفعه بروز می کند.
She’s not normally so outgoing; I never believed she
had it in her to perform in front of such a big audience.

به نقل از میریام وبستر:
: to have the ability ( to do something )
: be capable ( of something )
مثال:
His last performance was wonderful; I didn't know he had it in him
به کاری توانا بودن
تواناییِ [کاری] را داشتن