Meaning of the word "use soft words and hard arguments" in English

What does "use soft words and hard arguments" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

use soft words and hard arguments

US /juz sɔft wɜrdz ænd hɑrd ˈɑrɡjəmənts/
UK /juːz sɒft wɜːdz ænd hɑːd ˈɑːɡjumənts/
"use soft words and hard arguments" picture

Idiom

to speak in a polite and gentle manner while presenting strong, logical, and convincing facts

Example:
In a negotiation, it is often best to use soft words and hard arguments to win over your opponent.
He managed to settle the dispute because he knew how to use soft words and hard arguments.