amplify

/ˈæmpləˌfaɪ/

increase in size, volume or significance

中文释义：放大；增强；扩大

The speaker used a microphone to amplify his voice for the large audience.

演讲者使用麦克风放大声音，以便众多听众能听到。

Social media can amplify the impact of a campaign quickly.

社交媒体可以迅速扩大一场运动的影响力。