bolt

/bəʊlt/ (bre, ipa) · /bəʊlt/ (ame, ipa) · /ˈbōlt/ (ame, mw) · /boʊlt/ (ame, ipa)

bolt — 名詞

1. a sliding bar fitted within a door, gate, or window frame to hold it closed.

1.名詞B2
釋義

門閂

滑動後可把門窗閂住的橫栓

a sliding bar fitted within a door, gate, or window frame to hold it closed.

例句

The back gate's bolt jammed after three days of heavy rain.

後門的門閂在連下三天大雨後卡住了。

gate/door bolt

Priya slid the bolt quietly before opening the upstairs window.

Priya 先輕輕滑上門閂,才打開樓上的窗戶。

slide the bolt

同義詞
  • bar

    general word for a metal or wooden fastening piece.

  • latch

    usually a smaller catch rather than a heavy sliding bar.

  • deadbolt

    a specific lock type operated by a key or thumb turn.

反義詞
  • opening

    the unfastened state, with no bar holding the door shut.

文法句型

slide the bolt

door bolt

window bolt

用法筆記

Usually refers to a simple sliding bar rather than the whole lock. Common with doors, gates, shutters, and some windows.

常見錯誤

The lock fell off, and only the bolt stayed on the door.
The door bolt fell off, and the lock still worked with the key.
💡A bolt is one fastening part, not the whole lock.

2. a thick metal pin with threads at one end, tightened with a nut so that parts st

2.名詞B2
釋義

螺栓

配合螺帽固定零件的金屬栓

a thick metal pin with threads at one end, tightened with a nut so that parts stay firmly joined.

例句

The mechanic replaced a rusty bolt under the truck's left wheel.

技師更換了卡車左輪下方一顆生鏽的螺栓。

remove/replace a bolt

One missing bolt made the garden chair wobble on the patio.

少了一顆螺栓,花園椅就在露台上搖晃。

同義詞
  • fastener

    broad term for any device used to join parts.

  • pin

    may be smooth and not threaded like a bolt.

  • screw

    similar job, but a screw usually has a point or cuts into material.

反義詞

文法句型

tighten a bolt

remove a bolt

bolt and nut

用法筆記

Often paired with nut in engineering and repair talk. Distinguish from a screw, which usually turns directly into the material.

常見錯誤

Use one screw and a nut to hold the bike seat.
Use one bolt and a nut to hold the bike seat.
💡Bolts are the fasteners normally matched with nuts.

3. a line of lightning that cuts across the sky for a moment during a storm.

3.名詞B2
釋義

閃電

暴風雨中劃過天空的一道雷電

a line of lightning that cuts across the sky for a moment during a storm.

例句

A bright bolt split the clouds above the football field.

一道明亮的閃電劈開了足球場上空的雲層。

a bolt split the clouds

We counted seconds after each bolt during the summer storm.

夏季暴風雨時,我們在每道閃電後開始數秒數。

after each bolt

同義詞
  • flash

    general and can describe any sudden light.

  • stroke

    more technical in weather reports.

  • fork

    used when the lightning branches into several lines.

反義詞
  • darkness

    the sky without a sudden flash of light.

文法句型

a bolt of lightning

one bolt hit

see a bolt

用法筆記

Usually appears in the phrase 'a bolt of lightning'. It names one striking flash, not the whole storm.

常見錯誤

A lightning came down behind the school.
A bolt of lightning came down behind the school.
💡Use 'lightning' as the general phenomenon and 'bolt' for one clear flash.

4. one long wrapped piece of material, such as cloth or wallpaper, sold before it i

4.名詞C2
釋義

布卷

成卷供裁剪使用的布或壁紙

one long wrapped piece of material, such as cloth or wallpaper, sold before it is cut.

例句

The shopkeeper cut two meters from a blue bolt of cotton.

店員從一卷藍色棉布上裁下兩公尺。

bolt of cloth

A dusty bolt of wallpaper leaned behind the paint counter.

一卷積了灰的壁紙斜靠在油漆櫃台後面。

bolt of wallpaper

同義詞
  • roll

    the everyday word; 'bolt' is more trade-specific.

  • length

    can mean any measured piece, not necessarily a whole roll.

  • piece

    common in fabric sales, but less specific about shape.

反義詞
  • offcut

    a smaller piece already cut away from the main roll.

文法句型

bolt of cloth

bolt of wallpaper

cut from a bolt

用法筆記

Mostly used in sewing, fabric, and decorating contexts. The material is still in one uncut roll.

5. a short heavy shaft used as ammunition in a crossbow.

5.名詞C2
釋義

弩箭

由弩發射的短重箭

a short heavy shaft used as ammunition in a crossbow.

例句

The hunter placed a bolt on the crossbow string.

獵人在十字弓弦上放好了一支弩箭。

crossbow bolt

A museum case displayed iron bolts from the fifteenth century.

博物館的展示櫃裡陳列著十五世紀的鐵製弩箭。

historical weapon sense

同義詞
  • quarrel

    older technical word for a square-headed crossbow bolt.

  • arrow

    broader and more familiar, but less exact for crossbows.

  • projectile

    formal umbrella term for something shot through the air.

反義詞
  • target

    the thing aimed at rather than the thing fired.

文法句型

shoot a bolt

crossbow bolt

iron bolt

用法筆記

This is a historical or fantasy-world sense. In modern everyday English, people often just say 'arrow' unless the crossbow detail matters.

6. a sudden run towards a place, usually because someone or something is trying to

6.名詞C2
釋義

奔逃

突然朝某處衝去逃開的動作

a sudden run towards a place, usually because someone or something is trying to get away fast.

例句

At the fire alarm, there was a bolt for the nearest exit.

警報一響,大家立刻衝向最近的出口。

make a bolt for + place

The rabbit made a bolt across the road and vanished.

那隻兔子突然衝過馬路,一下就不見了。

a bolt across + place

同義詞
  • dash

    a fast short run, often without the strong escape idea.

  • rush

    broader and can be caused by hurry rather than fear.

  • scramble

    suggests awkward movement, often with hands and feet.

反義詞
  • pause

    a stop instead of a sudden burst of movement.

文法句型

make a bolt for

take a bolt for

a bolt across

用法筆記

Often appears in the pattern 'make a bolt for ...'. It focuses on the act itself, while verb sense 1 describes the movement as an action.

bolt — 動詞

bolt — 副詞