仲良(なかよ)し

なかよし
noun, na-adjective
close friend, on good terms
informalsociety
1. close friend, good friend, being on good terms
Describes people who get along well and have a friendly, harmonious relationship. Also used as an adjective-like modifier meaning 'friendly' or 'close.'
あの二人(ふたり)は仲良(なかよ)しだ。
Those two are close friends.
子(こ)どもの頃(ころ)からの仲良(なかよ)しだ。
We've been close friends since childhood.
Even though they're siblings, they don't get along at all.

Usage: 仲良(なかよ)し has a warm, somewhat childlike or casual tone. It is very common in everyday speech, especially among women and children, and sounds softer than the more neutral 仲(なか)がいい.

Common patterns

Similar: 仲(なか)がいい is a more neutral, adult way to say "to be on good terms." 仲良(なかよ)し sounds more affectionate and informal.