瀆

The glyph operates across two primary semantic fields:

1. Hydraulic: Man-made water channels, specifically drains, gutters, or sluices designed to move water away from a site or regulate its flow.

2. Ritual/Moral: To blaspheme, profane, or treat the sacred with irreverence; the act of defiling a deity, ancestor, or sacred space.

• Noun: A physical drain or gutter.
• Verb: (Physical) To dig a channel or to drain; (Abstract) To insult, blaspheme, or violate the sanctity of something.

Contrast with 溝 (gōu): While both can be translated as "ditch" or "trench," 溝 is more frequently used for the physical object itself. The use of 瀆 often signals a nuance of lowliness, impurity, or—in non-hydraulic contexts—a deliberate violation of propriety.

• Semantic Bridge: The transition from "gutter" to "blasphemy" is based on the concept of "lowering"—treating a sacred object as if it were a common drain.
• Contextual Warning: In ritual, political, or philosophical texts, prioritize the "profanation/blasphemy" reading unless the passage explicitly concerns agriculture or city planning.