Definition

1. Noun:

   • Comma: The punctuation mark (,) used to separate parts of a sentence or items in a list.
   • Prime symbol: In mathematics and science, a mark ( ′ ) similar to an apostrophe, used as a notation to denote a derivative, a specific variable, or a unit of measurement (e.g., feet).

2. Verb:

   • To fan gently / to flick: To move a fan, feather duster, or a similar object lightly to remove dust or create a gentle breeze.
   • To brush off lightly: To remove something with a soft, sweeping motion.

Usage Examples

• Noun:

  • Trong câu này, bạn cần đặt một dấu phẩy. (In this sentence, you need to place a comma.)
  • Tốc độ được ký hiệu là v phẩy. (The velocity is denoted as v prime.)

• Verb:

  • Bà cầm quạt phẩy nhẹ cho mát. (She held a fan and fanned gently to cool down.)
  • Anh ấy lấy tay phẩy hạt bụi trên áo. (He used his hand to flick the speck of dust off his shirt.)

Advanced Usage

• "dấu phẩy": comma (punctuation).

  • Dấu phẩy giúp câu văn rõ ràng hơn. (The comma makes the sentence clearer.)

• "chấm phẩy": semicolon (punctuation mark ;).

  • Hãy dùng chấm phẩy để nối hai mệnh đề độc lập. (Use a semicolon to join two independent clauses.)

Variants and Related Words

• phây phẩy (adv/onomatopoeia): describes the gentle, swaying motion of fanning or a light breeze.
  • Chiếc quạt nan đưa phây phẩy. (The bamboo fan swayed gently.)

Synonyms

• Comma: punctuation mark (,).
• Prime: symbol ( ′ ).
• Fan: to move air lightly.
• Flick: to brush away lightly.

Related Idioms

Note: The word "phẩy" itself is not commonly used in idiomatic expressions. Its primary use is literal, as a noun for punctuation or a verb for a light action.

1. Fan gently (flick) off
   • Lấy quạt phẩy bụi trên bàn
     To fan gently the dust off a table
   • xem dấu phẩy ; chấm phẩy