vexation

英[vek'seɪʃ(ə)n] 美[vɛk'seʃən]

1. anger produced by some annoying irritation

2. the psychological state of being irritated or annoyed

3. something or someone that causes anxiety; a source of unhappiness;

"New York traffic is a constant concern"

"it's a major worry"

4. the act of troubling or annoying someone