挿す

1. Origins, structure, and basic meaning

• Structure: 挿す, read さす, is a transitive verb joining the insertion stem 挿 with ending す.
• Basic usage: It means inserting a slender or long object into a holder or opening, as in 花を花瓶に挿す or 飾りを髪に挿す.

2. Common pitfalls and similar expressions

• Grammar and combinations
  • Homophones differ by spelling: 刺す means piercing and 差す includes opening an umbrella, so choose the character by the object and action.