* Selfishness: This is the most direct opposite of altruism, focusing on putting one's own needs and interests above others.
* Egoism: Similar to selfishness, egoism emphasizes self-interest and personal gain.
* Greed: This focuses on an excessive desire for more, often at the expense of others.
* Self-centeredness: This describes someone who is primarily concerned with themselves and their own needs.
* Narcisissm: This is a personality disorder characterized by an inflated sense of self-importance and a lack of empathy for others.
* Cynicism: This is a distrustful and pessimistic attitude, often stemming from a belief that others are motivated by self-interest.
* Apathy: This is a lack of interest, concern, or emotion, making someone indifferent to the needs of others.
The specific antonym you choose should reflect the nuance of the situation. For example, if you are discussing someone who is unwilling to help others, "selfishness" might be the best choice. If you are discussing someone who is motivated by their own gain, "greed" might be more appropriate.