κυριάκος

In a sentence

• Ο Κυριάκος είναι καλός μαθητής.

  Kyriakos is a good student.

  Here, 'Κυριάκος' is used as a proper noun, denoting a specific person's name.

• Η καλή κυριακή είναι κυριακάτικη παράδοση.

  The good Sunday is a Sunday tradition.

  Here, 'Κυριακή', a related word, is used to refer to Sunday, showcasing the root's relation to time or days of the week.

• Ο Παύλος και ο Κυριάκος είναι φίλοι για πολλά χρόνια.

  Pavlos and Kyriakos have been friends for many years.

  Here, 'Κυριάκος' is again used as a proper noun in a grammatical sentence involving relationships.