From the same as Sekuw; observant, i.e. (concretely) the mind -- heart.
see HEBREW Sekuw
H7907. sekvi
שֶׂכְוִי noun [masculine] perhaps a celestial appearance, phenomenon (Rabb Thes mind; De (after Talmud) cock (compare Late Hebrew שֶׂכְוִי cock, שֶׂכְוְיָה hen, foreign words accusative Dalm), Di 'Wolkengebilde'); — absolute ׳שׂ perhaps of clouds (compare "" טֻחִוֺת) Job 38:36 (RVm meteor).