Meaning and Usage
The suffix ～口 (くち) generally refers to an "opening," "entrance," or "exit" of a place or object. It is commonly attached to words indicating locations or containers to specify a particular access point.
Common Contexts
You will often see ～口 used in public places such as stations (北口 north exit, 南口 south exit), buildings (出入口 entrance/exit), or containers (投入口 opening for inserting something).
Collocations and Patterns
- 北口・南口・東口・西口: cardinal direction + exit/entrance, used to specify station or building exits.
- 出入口 (でいりぐち): entrance and exit, often used for buildings or rooms.
- 投入口 (とうにゅうぐち): insertion opening, used for machines or containers.
Register and Nuance
This suffix is neutral and commonly used in everyday and formal contexts. It is not a standalone word but always attached to another noun.
Common Mistakes
Learners sometimes confuse ～口 with 口 (くち) meaning "mouth" alone. Remember that ～口 here functions as a suffix meaning "opening" or "entrance," not the literal mouth of a person or animal.