The phrase "wert on" is a colloquial term used to describe someone who is angry or upset about something. There are many synonyms for this phrase, including phrases like "frustrated," "irritated," "annoyed," and "irked." Other synonyms for this phrase include "displeased," "vexed," "chagrined," "miffed," and "ticked off." These terms all describe a sense of dissatisfaction or discomfort caused by a particular situation or circumstance. Whether you're dealing with a difficult work project, a challenging relationship, or just the humdrum of daily life, there are many ways to express your frustration without resorting to the same old phrases.