This is the 11513th most frequent Russian word.
досады
Annoyance or vexation.
In this context, 'досады' depicts an emotional undercurrent that the subject is trying to mask with a smile.
Её улыбка скрывала следы досады на лице.
Her smile concealed traces of annoyance on her face.
In this sentence, 'досады' represents a feeling of annoyance or frustration, highlighting a subtle emotional state.
Он выразил нотку досады в своём голосе.
He expressed a hint of annoyance in his voice.
Here, 'досады' refers to the reason for his distraction, describing a state that affects his focus.