tributary

支流

より大きな川や湖に流れ込む川や小川。

やさしい英語で： A river or stream that flows into a larger river or lake.

• This stream is a tributary.
• Several tributaries join the river near the town.
• We followed a tributary of the Amazon.

使い方： tributary of something (The stream is a tributary of the main river.)

類義語： feeder stream

よく使う表現： major tributary, tributary of something, small tributary

朝貢国

多くは保護を受けるため、強い国に定期的に金品を納める国や集団。

やさしい英語で： A country or group that regularly pays a more powerful country, often for protection.

• The kingdom became a tributary.
• The emperor demanded payments from his tributaries.
• This small state was a tributary of the empire.

使い方： tributary of something (The kingdom was a tributary of the northern empire.)

類義語： tributary state

よく使う表現： imperial tributary, tributary of something, loyal tributary

流入静脈

より太い静脈に血液を送り込む細い静脈。

やさしい英語で： A smaller vein that carries blood into a larger vein.

• This vein has several tributaries.
• Blood enters the larger vein through a tributary.
• The surgeon identified a tributary of the femoral vein.

使い方： tributary of something (This vessel is a tributary of a larger vein.)

よく使う表現： venous tributary, tributary of something, small tributary

流れ込む、寄与する

小さな一部分として、より大きなものに流れ込んだり役立ったりする。

やさしい英語で： Supplying or contributing to something larger, as a smaller part of it.

• Small tributary streams feed the lake.
• This river is tributary to a larger one.
• The historian traced the tributary sources of the movement.

使い方： tributary to something (These streams are tributary to the main river.)

類義語： contributing, feeding

よく使う表現： tributary stream, tributary to something, tributary sources