Meaning and Usage
"自動" (じどう) means "automatic" or "self-motion." It describes something that operates by itself without manual intervention. This word is commonly used in technology, machines, and systems that function automatically.
Common Collocations
- 自動販売機 (じどうはんばいき): vending machine, a machine that sells items automatically.
- 自動車 (じどうしゃ): automobile, a vehicle that moves by itself.
- 自動更新 (じどうこうしん): automatic update, often used for software or systems.
Usage Notes
"自動" is a noun or a prefix that modifies other nouns to indicate automatic operation. It is neutral in formality and widely used in everyday and technical contexts. Learners should not confuse "自動" with "自動的" (じどうてき), which is an adjective meaning "automatic" or "automatically." Both are related but used differently grammatically.
Common Mistake
A common learner mistake is to use "自動" alone as an adjective without a noun. Remember that "自動" usually modifies a noun or is part of a compound word. For example, say "自動ドア" (automatic door) rather than just "自動" to describe something automatic.