flatness

/ˈflætnəs/ (bre, ipa) · /ˈflætnəs/ (ame, ipa)

flatness — noun

1. the state of having an even surface, with no raised, curved, or hollow areas

1.名詞B2
釋義

the state of having an even surface, with no raised, curved, or hollow areas

例句

The flatness of the road let Adisa ride home without slowing down.

the flatness of [surface] affects movement

Xiu checked the flatness of the cake top before adding the final layer.

check the flatness of [object]

同義詞
  • evenness

    a broad everyday choice for a surface without bumps or dips

  • levelness

    more specific when one side should not be higher than another

  • smoothness

    focuses more on touch and lack of roughness than on shape

反義詞
  • unevenness

    the presence of bumps, dips, or different heights

  • roughness

    suggests an irregular or harsh surface texture

文法句型

the flatness of [surface / object]

用法筆記

Most often used when checking or measuring surfaces such as roads, walls, boards, or cake layers. In everyday speech, people often prefer the adjective flat unless the quality itself is the focus.

常見錯誤

❌We checked if the floor was very flatness.
✅We checked the flatness of the floor.
💡After 'was' use the adjective 'flat'; use the noun when naming the quality itself.

2. an unemotional quality in a voice, face, or reply that makes it seem cold, dull,

2.名詞C1
釋義

an unemotional quality in a voice, face, or reply that makes it seem cold, dull, or uninterested

例句

The flatness in Christopher's voice worried his sister after the hospital call.

flatness in [someone's] voice

Layla apologized, but Otis still noticed the flatness of her smile.

同義詞
  • coldness

    stronger and more personal, often about the way someone treats others

  • blankness

    often used for an expression with little visible feeling

  • dullness

    can describe speech or performance that lacks energy

反義詞
  • warmth

    shows kindness, friendliness, or emotional presence

  • animation

    suggests lively energy in speech, expression, or movement

文法句型

flatness in [someone's] voice

the flatness of [reply / smile / greeting]

用法筆記

Often used for the way someone sounds, looks, or responds rather than for private feelings inside them. It usually suggests that an outside listener or viewer notices a lack of warmth or interest.

常見錯誤

❌The flatness of his desk upset the customers.
✅The flatness of his reply upset the customers.
💡This sense is about an unemotional manner, not about a physically level surface.