This is the 490th most frequent Japanese word.
火
"Fire."
火 (ひ, hi) refers to 'fire' in its literal sense, representing a combustion phenomenon.
火が燃えています。
The fire is burning.
Here, 火 (ひ, hi) signifies a controlled fire, created for a specific purpose like cooking or warmth.
キャンプのために火をおこしました。
I started a fire for the camping.
In this sentence, 火 (ひ, hi) is used in the context of igniting or setting something on fire, typically with a cautionary implication.