Senses
扣子 variants: 釦子 knot
a knot tied in a rope, ribbon, or string
扣子 variants: 釦子 cliffhanger
a break in a story at a critical moment to create suspense, commonly used in traditional storytelling or serialized novels
扣子 bottleneck
a point of congestion or obstruction
扣子 variants: 釦子 hindrance
an obstacle to understanding or a mental block