Yes, an INTJ can be shy. While INTJs are often described as confident and assertive individuals, they can also exhibit shyness in certain situations or with certain people. It is important to remember that personality types, such as INTJ, are not absolute and can vary from person to person.

Shyness is typically characterized by feelings of discomfort, self-consciousness, and a tendency to avoid social interactions or situations. It can manifest differently in each individual, but some common traits associated with shyness include:

1. Social Anxiety: INTJs may experience social anxiety, which can make them feel nervous or anxious in social settings. They may worry about being judged or criticized by others, leading them to avoid social interactions or feel uncomfortable in large groups.

2. Reserved Nature: INTJs are known for their introverted nature, preferring to spend time alone or with a small group of close friends. This introversion can sometimes be mistaken for shyness, as they may be more reserved and less likely to initiate conversations or engage in small talk.

3. Difficulty Expressing Emotions: INTJs tend to be more focused on logic and rationality rather than emotions. This can make it challenging for them to express their feelings or open up to others, leading to a perception of shyness.

4. Selective Socializing: INTJs are highly selective when it comes to their social interactions. They prefer quality over quantity and may choose to spend their time with a few close friends or individuals who share their interests and values. This selectiveness can sometimes be misconstrued as shyness or aloofness.

5. Fear of Rejection: INTJs value competence and efficiency, and they may fear being rejected or criticized for their ideas or actions. This fear of rejection can contribute to shyness, as they may hesitate to share their thoughts or engage in social situations where they feel vulnerable.

It is important to note that shyness is not an inherent trait of the INTJ personality type, but rather a potential aspect that can be influenced by various factors such as upbringing, past experiences, and individual differences. Some INTJs may be more naturally outgoing and confident, while others may exhibit shyness in certain contexts.