undermined
adj. B2 Upper Intermediate US //ˌəndɝˈmaɪnd// UK //ˌʌndəmˈaɪnd// un·der·mined
adj. feeling less confident or less powerful because someone has damaged your position or authority.
adj. having had one's authority, confidence, or effectiveness weakened or eroded. Often used predicatively after linking verbs like 'feel' or 'become'.
She felt undermined by her manager's constant criticism.
The team's morale was undermined when the project lead ignored their suggestions during the final meeting.
The credibility of the witness was significantly undermined when the defense attorney presented evidence that contradicted her previous testimony regarding the timeline of events.
Usage
Participial adjective; frequently follows linking verbs or appears in passive constructions to describe a state of weakened authority.