fluidity

/fluˈɪdəti/ (bre, ipa) · /fluˈɪdəti/ (ame, ipa) · /flü-ˈi-də-tē/ (ame, mw)

fluidity — noun

1. a state where something keeps changing and does not stay fixed for long

1.名詞C1
釋義

a state where something keeps changing and does not stay fixed for long

例句

The fluidity of online prices made Iris check the ticket cost every hour.

fluidity of prices that change often

Teachers discussed the fluidity of teenage friendships at the school meeting.

同義詞
  • changeability

    a broad, neutral word for the ability or tendency to change

  • volatility

    stronger; suggests sudden, risky change

  • instability

    emphasizes lack of steadiness rather than freedom to shift

反義詞
  • stability

    the state of staying steady and predictable

  • fixity

    formal word for staying fixed and unchanged

文法句型

fluidity + of + noun phrase

用法筆記

Usually followed by 'of' plus a system, rule, relationship, or identity. Distinguish from sense 2: this sense is about ongoing change over time, not smooth movement or style.

常見錯誤

❌The fluidity of the schedule means it is very stable.
✅The fluidity of the schedule means it changes easily.
💡In this sense, fluidity means a lack of fixed form, not steadiness.

2. an easy, smooth, unbroken quality in movement, speech, writing, or design

2.名詞C1
釋義

an easy, smooth, unbroken quality in movement, speech, writing, or design

例句

Sayaka practiced daily to improve the fluidity of her violin playing.

fluidity of movement in a performance

The dancer's fluidity made each turn look easy and natural.

同義詞
  • smoothness

    focuses on the absence of roughness or interruption

  • grace

    adds elegance, especially in movement

  • flow

    less formal; often used for speech, writing, or motion

反義詞

文法句型

fluidity + of + noun phrase

with + fluidity

用法筆記

Most often used with movement, speech, writing, or visual design. Distinguish from sense 1: sense 2 describes smooth flow, not repeated change in a situation.

常見錯誤

❌Her report had fluidity because every point was confusing.
✅Her report had fluidity because each idea connected smoothly.
💡This sense is about smooth flow, not lack of clarity.

3. the property that lets a substance move and spread freely instead of keeping a f

3.名詞C1
釋義

the property that lets a substance move and spread freely instead of keeping a firm shape

例句

Lab workers measured the fluidity of the oil at three temperatures.

fluidity of a substance in testing

The sauce lost fluidity after cooling on the kitchen counter.

同義詞
  • liquidity

    technical word for the state of behaving like a liquid

  • flowability

    technical term that stresses how easily a material moves

反義詞
  • solidity

    the state of keeping a firm shape instead of flowing

  • rigidity

    emphasizes resistance to movement or change of shape

文法句型

fluidity + of + noun phrase

high / low fluidity

用法筆記

Common in scientific, industrial, and cooking contexts when people describe how easily a substance moves. Distinguish from sense 2: sense 3 describes the material itself, not the grace of movement or expression.

常見錯誤

❌The fluidity of the brick changed in the heat.
✅The fluidity of the wax changed in the heat.
💡This sense applies to substances that can move or pour, not rigid solids like bricks.