kilku

In a sentence

• Zaprosiłem kilku znajomych na imprezę.

  I invited a few friends to the party.

  Here, "kilku" is used to mean "a few" and it modifies the plural noun "znajomych," specifying an indefinite small number of friends.

• Rozmawialiśmy przez kilka minut.

  We talked for a few minutes.

  In this sentence, "kilka" again means "a few" but refers to "minutes" (an amount of time), highlighting an approximate short duration.

• Mam kilka pomysłów na ten projekt.

  I have a few ideas for this project.

  Here, "kilka" is used to indicate an indefinite small number of "pomysły" (ideas), showing the speaker's possession of multiple but not many project ideas.