ko

In a sentence

• Jag såg en ko stå på fältet.

  I saw a cow standing in the field.

  Here, 'ko' is used to refer to the animal 'cow' as a common noun related to livestock.

• Vi lekte ko och kalv på gården.

  We played cow and calf in the yard.

  Here, 'ko' is used metaphorically within a playful context to describe an imaginary representation during a game.

• Den gamla ko på krogen brukade servera oss kaffe.

  The old cow at the inn used to serve us coffee.

  Here, 'ko' is utilized in a colloquial and somewhat coarse manner to refer to a person informally, demonstrating slang or idiomatic usage.