机

1. Concrete apparatus: Originally the mechanism of a loom (the shuttle or trigger); generally refers to a specific device or the functional part that enables movement.

2. Mechanical release: A trigger, most common in military or hunting contexts (e.g., the trigger of a crossbow).

3. Critical pivot: The decisive point, "hinge," or precise instant upon which a situation turns; a critical juncture or opportunity.

4. Subtle/Hidden: That which is internal, secret, or subtle, derived from the concealed nature of a mechanism within its frame.

• As Noun: Refers to a physical trigger or an abstract opportunity/moment.
• As Modifier: Often shifts in meaning toward "critical," "subtle," or "hidden."

There is significant semantic overlap with 幾 (meaning "almost" or "on the verge of"). Both glyphs deal with thresholds and tipping points. In passages where both appear, the author is likely emphasizing the moment immediately preceding a change in state.

• Traditional variant: 機
• Semantic variant: 幾

Avoid translating as "machine" in a general sense unless the text is late enough to support modern usage. In early texts, prioritize a specific device or the principle of a mechanism.