不足, 不平
disgruntled、 dissatisfied
in a state of sulky dissatisfaction
すねた不満な状態で
不平, 不服
dissatisfaction
the feeling of being displeased and discontent
不愉快、不満な気持ち
he was never slow to express his dissatisfaction with the service he received
彼は、彼が受けたサービスに対する不満を言うまで、さほど時間がかかることはない