Meaning and Usage
"歯車" (はぐるま) literally means "gear" or "cog-wheel," referring to the toothed wheels used in machinery to transmit motion. It is a common technical term but also frequently used metaphorically.
Literal Use
In mechanical contexts, "歯車" describes the physical gears inside devices like clocks, cars, or machines. For example, "時計の中には小さな歯車がたくさん入っている" shows a typical literal use.
Metaphorical Use
"歯車" is often used metaphorically to describe a person or element as a part of a larger system, like a cog in a machine. For instance, "会社の歯車の一つとして" means "as one cog in the company," emphasizing the importance of each member's role.
Common Collocations
- 歯車がかみ合う: gears mesh properly; used literally and figuratively to mean things working smoothly together.
- 歯車が狂う: gears go out of alignment; used figuratively to mean something is going wrong or out of order.
- 歯車の一つ: one cog; used metaphorically for a single part of a larger system.
Register and Nuance
"歯車" is a neutral term suitable for both technical and figurative contexts. It is common in written and spoken Japanese at intermediate levels (N2).
Learner Tip
Be careful not to confuse "歯車" with "歯医者" (はいしゃ, dentist). Also, when used metaphorically, it implies being part of a system rather than standing out individually.