un·re·ward·ing 
/ˌʌnrɪˈwoɚdɪŋ/ adjective
/ˌʌnrɪˈwoɚdɪŋ/ adjective [more unrewarding; most unrewarding] : not giving you a good feeling that you have done something valuable, important, etc. : not rewarding
▪ an unrewarding task ▪ I find the work dull and unrewarding.
▪ an unrewarding task ▪ I find the work dull and unrewarding.
