introversion

英 [,ɪntrəʊ'vɜːʃən] 美[,ɪntrə'vɝʃən]

• n. 内省性，内向性

1. the condition of being folded inward or sheathed

2. the folding in of an outer layer so as to form a pocket in the surface;

"the invagination of the blastula"

3. (psychology) an introverted disposition; concern with one's own thoughts and feelings