Translation

• to grow beyond the naivete of childhood
• to be aware of what is going on in the world
• (esp. of a child) sensible
• thoughtful
• intelligent

Synonyms

• 开窍, 觉世, 记事儿, 通窍

Examples

• 在你这个年纪你应该要更懂事。
  You ought to know better at your age.
• 你们这些家伙真不懂事。
  You guys are totally clueless.