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单
dān
single
这是一本单词书。
This is a single-word book.
formal
single; sole; alone
他单独完成了这个项目。
He completed the project single-handedly.
这本书是单行本。
This book is a single-volume edition.
Used to describe something that is not accompanied by others or done alone.
formal
odd (number)
这个数字是单数。
This number is odd.
Refers to numbers not divisible by two.
formal
list; bill; form
请把账单给我。
Please give me the bill.
Commonly used in business contexts like invoices or receipts.
formal
sheet (of paper)
他拿了一张单纸。
He took a sheet of paper.
Refers to a piece of paper or document.
Related Phrases
Pro Tip
Common Mistakes
Avoid confusing 单 (single/odd) with 单独 (alone) or 单词 (word). Each has distinct meanings and usage contexts.
Gold Rule
Usage in Numbers
When referring to numbers, 单 means 'odd' (e.g., 单数). Do not confuse it with 'even' (双数).
Word Origin
The character 单 (dān) originates from the Oracle Bone Script (甲骨文) and Bronze Script (金文), where it depicted a single-layered shield or a single object. Over time, its meaning expanded to include concepts of 'single,' 'sole,' and 'odd.'
Usage Notes
1. 单 can function as an adjective, noun, or adverb depending on context. 2. In financial contexts, 单 often refers to a bill or invoice (e.g., 账单). 3. When describing numbers, 单 specifically means 'odd' (as opposed to 'even').
Word Breakdown
单
single; sole
root汉英词典