繭糸

1. Origins, structure, and basic meaning

• Structure: Written 繭糸 and read けんし, it is the fine filament unwound from a silkworm cocoon.
• Basic usage: It is twisted into stronger thread in a workshop and examined up close for its sheen.

2. Common pitfalls and similar expressions

• Fiber rather than finished silk fabric
  • The word names the cocoon-derived thread before it is woven into cloth.