IPA: /ˌʌn.rɪˈwɔː.dɪŋ/
KK: /ʌnˈriːwɔːrdɪŋ/
Not giving any reward or satisfaction; lacking in positive outcomes or benefits.
Many people find that their jobs can be unrewarding if they do not feel appreciated.
Unrewarding → It is formed from "un-" (meaning not) and "rewarding" (from the root "reward" which comes from Old French *recompenser*, meaning to compensate or repay). The word "unrewarding" means not providing a reward or not yielding satisfaction or benefit.
Think of 'not' ('un-') providing a 'reward' — that's why unrewarding means something that does not give you a reward.