justification
/ˌdʒʌstɪfɪˈkeɪʃn ˌजस्टिफ़िˈकेश्न्/ noun [C, U] (a) justification (for something/doing something) (a) good reason स्वीकार्य कारण, औचित्य
I can’t see any justification for cutting his salary.