Actions speak louder than words is the saying that what people do proves more than what they say. As they say, actions speak louder than words.
It is used to answer a promise with scepticism, and it works as a whole sentence on its own. The idea is far older than the English wording, which settled in the seventeenth century.
1phraseactions speak louder than wordsThe saying: what people do proves more than what they say.
“He apologised again, but actions speak louder than words.”
actions speak louder than words is a saying.
Practised in Idioms