祖

• Biological/Familial: Ancestor or forefather. In strict kinship contexts, it often denotes the paternal grandfather specifically, though it frequently expands to encompass all preceding generations.
• Institutional/Spiritual: The founder or origin point of a school of thought, religious tradition, or sect (e.g., "Patriarch"), referring to the transmission of authority and teaching rather than biological descent.
• Ritual: An ancestor as an object of ritual obligation and veneration.

Contrast with 宗: While both relate to ancestry, 祖 typically refers to the source (the actual progenitors or biological roots), whereas 宗 tends toward the system (the clan, the ancestral temple, or the collective identity of the lineage).

The glyph incorporates 且 (a ritual tablet/altar), which associates the term with a status of veneration.

• Specificity: Exercise caution when translating as "grandfather"; verify if the context implies a general ancestral category.
• Orthographic Caution: Distinguish clearly from 组 ("bundle" or "group"), which is semantically distinct in early texts.