IPA: /dɪsˈkɒntɛndli/
KK: /dɪsˈkɒntɛndli/
In a way that shows dissatisfaction or unhappiness.
She sighed discontentedly when she saw the mess in the kitchen.
Discontentedly → It is formed from "dis-" (meaning apart or away) and "content" (from Latin "contentus", meaning satisfied or pleased) and the suffix "-ly" (meaning in a manner). The word describes a manner of being not satisfied or pleased, indicating a state of unhappiness or dissatisfaction.
Think of being 'away from' ('dis-') feeling 'satisfied' ('content') — that's why discontentedly means feeling unhappy or dissatisfied.