"Wert in action" is an expression used to describe someone who is actively demonstrating their worth or value. The spelling of "wert" comes from the archaic English verb "to be" in the second person singular form. It is pronounced /wɜrt/, with the "w" sound at the beginning, the vowel sound /ɜr/ in the middle, and a soft "t" sound at the end. The spelling has remained unchanged since the Middle English period, although the pronunciation has evolved over time.