- 含む — to include; to hold in the mouth
- 含める — to include; to make aware
- 含有 — inclusion; content
- 内含 — internal inclusion
- 包含 — inclusion; to cover
Think of a mouth holding something inside — that’s the core of 含. From there, the meaning expands to “include” or “contain,” not just physically, but also in a broader sense of holding or embracing.