Tra từ duplicate - Từ điển Oxford Advanced Learner 8th

du·pli·cate [duplicate duplicates duplicated duplicating] verb, adjective, noun
verb BrE [ˈdjuːplɪkeɪt] ; NAmE [ˈduːplɪkeɪt]
1. often passive ~ sth to make an exact copy of sth
•a duplicated form
2. ~ sth to do sth again, especially when it is unnecessary
•There's no point in duplicating work already done.
Verb forms:

Word Origin:
late Middle English (in the sense ‘having two corresponding parts’): from Latin duplicat- ‘doubled’, from the verb duplicare, from duplic- ‘twofold’, from duo ‘two’ + plicare ‘to fold’.

Example Bank:
•I wanted to avoid simply duplicating work that had already been done.
•The original experiment cannot be exactly duplicated.
•This is a natural look which you can easily duplicate at home.
•Please keep the duplicated form and send us the original.
•There's no point in duplicating work already done.
Idiom: ↑in duplicate
Derived Word: ↑duplication

adjective BrE [ˈdjuːplɪkət] ; NAmE [ˈduːplɪkət] only before noun
exactly like sth else; made as a copy of sth else
•a duplicate invoice

Word Origin:
late Middle English (in the sense ‘having two corresponding parts’): from Latin duplicat- ‘doubled’, from the verb duplicare, from duplic- ‘twofold’, from duo ‘two’ + plicare ‘to fold’.

noun BrE [ˈdjuːplɪkət] ; NAmE [ˈduːplɪkət]
one of two or more things that are the same in every detail
Syn: ↑copy
•Is this a duplicate or the original?

Word Origin:
late Middle English (in the sense ‘having two corresponding parts’): from Latin duplicat- ‘doubled’, from the verb duplicare, from duplic- ‘twofold’, from duo ‘two’ + plicare ‘to fold’.

Example Bank:
•The contract is prepared in duplicate, so that both parties can sign it.
•The ring was an exact duplicate of her mother's ring.
•We made a duplicate of the key.