The word can be offensive in modern usage; use with care due to changing gender norms. Describing someone as effeminate might be seen as insensitive today.
Pro Tip 2/3
Perceived Weakness
May imply weakness or lack of strength, often used negatively. He disliked being called effeminate because he felt it questioned his strength.
Pro Tip 3/3
Stereotypical Gender Roles
Reflects traditional stereotypes not fitting all cultures or individuals. His friends labeled his careful choice of words as effeminate, showing their own biases.