lacking
adjective
ˈlækɪŋ 
ˈlækɪŋ 
1 lacking (in something) having none or not enough of somethingShe's not usually lacking in confidence.The book is completely lacking in originality.He was taken on as a teacher but was found lacking (= was thought not to be good enough).2 not present or not availableSynonym
missingI feel there is something lacking in my life.