na-adjective
unsociable; retiring; solitude-loving
Describes a person who avoids social interaction, preferring solitude. Often used as a personality descriptor.
彼は非社交的な性格で、週末はいつも一人で過ごしている。
He has an unsociable personality and always spends weekends alone.
Compound of 非 (hi-, 'non-') + 社交 (shakō, 'social interaction') + 的 (-teki, '-like').