pile up

たまる、ためる

未処理の物などが数や量を増す、または増やしてためる。

やさしい英語で： To increase in number or amount, often because things are not being dealt with.

• My bills are piling up.
• Emails piled up while I was away.
• Do not let unfinished tasks pile up.

類義語： accumulate, build up, mount up

よく使う表現： pile up quickly, pile up debts, pile up again

積み上げる、積み重なる

物を上へ重ねる、または物が重なって山になる。

やさしい英語で： To put things on top of each other, or collect into a heap.

• Pile up the plates here.
• Snow piled up against the wall.
• They piled their coats up on a chair.

使い方： pile something up somewhere (We piled the boxes up beside the door.)

類義語： heap up, stack up

よく使う表現： pile up books, pile something up, pile up outside

玉突き事故を起こす、衝突する

車で事故を起こす。特に複数の車が次々と衝突すること。

やさしい英語で： To crash a vehicle, especially when several vehicles hit one another.

• Three cars piled up in the fog.
• Several trucks piled up on the icy road.
• Vehicles began piling up behind the first crash.

類義語： crash, collide

よく使う表現： pile up here, pile up behind, pile up again