He felt discontented with his current job, always longing for better opportunities.

discontented 是由前缀 dis-（表示"不、否定"）和形容词 contented（"满意的"）组成的形容词。contented 来自动词 content（"使满足"）的过去分词形式。 discontented 意思是"不满意的、不满足的"，描述一种对现状感到不满足的心理状态。