蓋

Concrete noun: A lid, cover, or canopy.

Verb: To cover, shield, or conceal (typically implying a top-down action).

As a concrete verb, it typically takes a direct object.

In formal prose (particularly from the Han period onward), it functions as a clause-initial particle, frequently paired with a final 也, to manage logical relationships:

1. Explanatory/Causal: Introduces the reason or background for the preceding statement.

2. Speculative/Probabilistic: Indicates a logical inference or reasoned guess.

Distinguish from 覆 (which often suggests overturning or complete envelopment) and 掩 (which typically refers to closing an opening or suppressing/blocking).

Semantic variants include U+76D6 and U+8462.

When used as a functional particle, the distinction between explanation and inference can be subtle. The choice depends on whether the author is providing known justification for a claim or speculating on the cause of a phenomenon.