undreamed of

undreamed of /ˌʌnˈdriːmd-/ adjective
also chiefly British undreamt of /ˌʌnˈdrɛmt-/
undreamed of
/ˌʌnˈdriːmd-/
adjective
also chiefly British undreamt of /ˌʌnˈdrɛmt-/
Britannica Dictionary definition of UNDREAMED OF
: much more or better than you thought was possible — usually used as undreamed–of or undreamt–of before a noun