影响力 (yǐngxiǎnglì) means 'influence' or 'impact,' referring to the power or capacity to affect people, events, or outcomes. It differs from 影响 (influence as a verb or general noun) by specifically emphasizing the strength or magnitude of that influence.
这位企业家在行业内有很大的影响力。
Zhè wèi qǐyèjiā zài hángyè nèi yǒu hěn dà de yǐngxiǎnglì.
This entrepreneur has great influence within the industry.
社交媒体的影响力越来越大了。
Shèjiāo méitǐ de yǐngxiǎnglì yuèláiyuè dà le.
The influence of social media is growing ever greater.
他的演讲非常有影响力,改变了很多人的想法。
Tā de yǎnjiǎng fēicháng yǒu yǐngxiǎnglì, gǎibiàn le hěn duō rén de xiǎngfǎ.
His speech was very influential and changed many people's thinking.