What is a synonym for introverted?

Here are some synonyms for introverted, depending on the specific nuance you want to convey:

General:

* Reserved

* Shy

* Withdrawn

* Quiet

* Solitary

* Reticent

* Inward

* Self-contained

Emphasizing social preference:

* Private

* Unassuming

* Secretive

* Unsociable

* Reclusive

Emphasizing thoughtfulness:

* Contemplative

* Reflective

* Thoughtful

* Meditative

Emphasizing a dislike of crowds:

* Hermit-like

* Loner

It's important to note that some of these words carry slightly negative connotations, so choose carefully based on the context.