unknown quantity
/ʌnˈnoʊn ˈkwɒn.tɪ.ti/
Something or someone unpredictable.
“The new player is an unknown quantity this season.”Add to my deck
/ʌnˈnoʊn ˈkwɒn.tɪ.ti/
Something or someone unpredictable.
“The new player is an unknown quantity this season.”Add to my deck