kanojo no iki wa atatakakatta.

Her breath was warm.

Breakdown of kanojo no iki wa atatakakatta.

• は: topic particle
• の: possessive case particle
• 彼女かのじょ: she
• 暖あたたかい: warm

Questions & Answers about kanojo no iki wa atatakakatta.

How do you read this sentence?

It is read:

かのじょ の いき は あたたかかった。

Word by word:

• 彼女 = かのじょ
• の = no
• 息 = いき
• は = written ha, but pronounced wa here
• 暖かかった = あたたかかった

What does 彼女の mean here?

彼女の means her or more literally of her.

The particle の connects two nouns and shows possession or relationship.

So:

• 彼女 = she / her / girlfriend, depending on context
• 彼女の息 = her breath

In this sentence, の works like the English 's or of.

What does 息 mean exactly?

息（いき） means breath.

It can refer to:

• the air someone breathes out
• breathing in general, depending on context

In this sentence, it most naturally means her breath as something physically felt, such as warm breath on someone’s skin.

A related word you may also see is:

• 吐息（といき） = breath, often exhalation, sometimes with a softer or more literary feeling

Why is は pronounced wa instead of ha?