Translation Ukrainian English: суттєвість
Dictionary: mainсуттєвістьіменник1 CORE, 
 Centre, 
 burden, 
 center, 
 effect, 
 essence, 
 gist, 
 heart, 
 heart and soul, 
 inwardness, 
 kernel, 
 marrow, 
 meat, 
 nitty-gritty, 
 nub, 
 perfume, 
 pith, 
 substance, 
 sum.