He was so career-obsessed that he forgot to celebrate his own birthday.

career-obsessed 是由名词 career（事业）和形容词 obsessed（着迷的、沉迷的）组成的复合形容词。obsessed 来自动词 obsess（使着迷），加上 -ed 后缀形成形容词。 career-obsessed 表示"对事业过度沉迷的"，形容一个人把全部精力都放在事业上，以至于忽略了其他重要事情。