resonance

the quality imparted to voiced speech sounds by the action of the resonating chambers of the throat and mouth and nasal cavities

having the character of a loud deep sound

a vibration of large amplitude produced by a relatively small vibration near the same frequency of vibration as the natural frequency of the resonating system

an excited state of a stable particle causing a sharp maximum in the probability of absorption of electromagnetic radiation

a relationship of mutual understanding or trust and agreement between people