Definition of Tonkin in English:

Tonkin

Syllabification: Ton·kin
Pronunciation: /ˈtäNGkən, ˈtänˈkin
 
/
A mountainous region in northern Vietnam, centered on the Red River delta.

Definition of Tonkin in:

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Word of the day anastrophe
Pronunciation: əˈnastrəfi
noun
the inversion of the usual order of words...