疵

Core meaning is a surface imperfection or blemish, ranging from the physical to the abstract:

• Physical/Medical: A cutaneous lesion, sore, or skin eruption.
• Material/Technical: A flaw in an object (e.g., a crack in jade) or an error in a text.
• Moral/Interpersonal: A foible, minor character flaw, or point of criticism.

• Noun: Refers to the defect itself.
• Verb: To find fault with or to criticize. In this role, it often requires specific syntactic positioning or phrasing to signal the action of pointing out a flaw.

• Versus 病 (bìng): While both can relate to illness, 疵 refers specifically to visible, superficial ailments rather than systemic illness.
• Versus 辜 (gū): Contrast with guilt or moral sin.
• Versus 缺 (quē): Contrast with a gap, omission, or structural lack.

The skin radical (皮) is the primary driver of meaning. The phonetic component (次) may suggest a "deviation" from a standard, though the dominant sense remains that of a visible, pointable imperfection.

When used metaphorically, the glyph retains a "surface" quality; it denotes a visible spot that marrs an otherwise complete or correct whole.