核心 (hé xīn): Core (Noun) — Meaning & Stroke Order

The apple is the core of the fruit.

His proposal did not touch upon the core of our current predicament.

Although there are many details, we must firmly grasp the core objective.

Teamwork is the core element for the success of the project.

We've been chatting for a while, but we haven't yet discussed the core theme of this gathering.