JLPT Level: N3
Meanings

the quality of being ~

the state or character of ~

ness; essence of ~

Usage

Adj-い-stem + み

Noun + み

Explanation
み is a suffix that turns a word into a noun indicating the quality, state, or nature of that word. It often conveys a poetic or literary nuance and is commonly used with i-adjectives (by taking the stem and adding み) to form words like sadness or warmth. The resulting noun describes the abstract feel or characteristic rather than a concrete quantity.
彼の別れには深い悲しみがあった。
かれのわかれにはふかいかなしみがあった。

There was deep sadness in his parting.

彼の笑顔には温かみを感じる。
かれのえがおにはあたたかみをかんじる。

One can feel warmth in his smile.