tween
noun/twiːn/
/twiːn/
(also tweenager
(informal)/ˈtwiːneɪdʒə(r)/
/ˈtwiːneɪdʒər/
, especially British English tweener /ˈtwiːnə(r)/
/ˈtwiːnər/
)- a child between the ages of about 10 and 12
10 至 12 岁之间的少年 Word Origin1940s: of unknown origin.