pen

In a sentence

• Aquest bolígraf és blau.

  This pen is blue.

  Here, 'bolígraf' refers to a writing instrument for writing or drawing.

• Hauria d’estar dins l’estoig, aquest bolígraf.

  This pen should be inside the pencil case.

  In this sentence, 'bolígraf' still refers to the physical object utilized for writing.

• Quan escrivia la carta amb el bolígraf, es va trencar la tinta.

  While writing the letter with the pen, the ink broke.

  Here, 'bolígraf' denotes a specific tool associated with writing, emphasizing its functional context.