a.

1. 拉緊的，繃緊的
   Pull the string taut.

   把線拉緊。

2. 緊張的，不自然的
   a taut expression on his face

   他臉上的緊張神情

3. 整潔的，秩序井然的

adj.

1. stretched or pulled tight.
   ▸(of muscles or nerves) tense.
2. (of writing, music, etc.) concise and controlled.
3. (of a ship) having a disciplined crew.