primer

下塗り剤、プライマー

塗料がよく付いて表面を覆えるよう、塗装前に塗る材料。

やさしい英語で： A substance put on a surface before painting to help the paint stick and cover well.

• Apply primer before you paint the door.
• The metal needs a coat of primer.
• Let the primer dry before adding the final color.

類義語： undercoat

よく使う表現： coat of primer, wood primer, apply primer

雷管、起爆剤

火薬などの爆発物を燃え始めさせる小さな装置や物質。

やさしい英語で： A small device or substance that starts the burning of gunpowder or another explosive.

• The cartridge contains a small primer.
• The firing pin struck the primer.
• The damaged primer failed to ignite the gunpowder.

よく使う表現： cartridge primer, primer cap, primer ignition

読本、初等読本

子どもに読み書きや単語のつづりの基礎を教える本。

やさしい英語で： A book that teaches children the first steps in reading, writing, and spelling.

• The child opened her primer.
• Their first reading primer had large letters and simple pictures.
• Teachers used these primers to teach spelling.

よく使う表現： reading primer, school primer, alphabet primer