вечер

In a sentence

• Всяка вечер гледам филм.

  Every evening, I watch a movie.

  Here, "вечер" is used as a noun to indicate the time period of the evening.

• Вечерта е много спокойна днес.

  The evening is very calm today.

  Here, "вечер" is used in its definitive form "вечерта" as a noun to refer to a specific evening.

• Обичам да чета вечер.

  I love reading in the evening.

  Here, "вечер" is used adverbially to indicate the time period during which the action takes place.