Englishfor English speakers
undertake
Verb
—
If you undertake something, you take responsibility for doing it and you start to do it.
He is in charge of this project and has undertaken this work largely single-handed since July.
After a common two years, some students undertake industrial or professional placement in their third year.
Britain has apparently undertaken to review its own aid to Vietnam.
a
Determinative
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A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
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A is the first letter of the alphabet.
The letter "a" comes before "b".
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In some schools, an A is a very high grade.
Ron got an A on his earth science test.
duty
Noun
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A duty is something that you should do.
Parents have the duty to educate their children.
—
A tax placed on imports or exports; a tariff, customs duty, excise duty.
Import duty and taxes are due when importing goods into the United States.