adjective
Definition: Describing someone who acts in a way that shows they are only interested in personal gain, often by being insincere or opportunistic.
Example: His timeserving attitude made it hard for others to trust him.
noun
Definition: The act of serving one's own interests or ambitions, often at the expense of others, typically by conforming to what is popular or expected.
Example: His timeserving attitude made it difficult for him to gain the trust of his colleagues.