活躍

1. Origins, structure, and basic meaning

• Structure: 活躍 is read as かつやく and functions as a noun or intransitive verb for performing prominently and successfully in a contest, profession, or public activity.
• Basic usage: Mark the arena with で in 決勝で活躍する and the capacity with として in 俳優として活躍する.

2. Common pitfalls and similar expressions

• More than being active
  • It implies a notable, positive contribution or performance, not merely the fact that someone is currently active.
• Parallel roles
  • だけでなく、脚本家としても expands the range from success as an actor to success as a screenwriter as well.