Definition of Tonkin in English:

Tonkin

Line breaks: Ton¦kin
Pronunciation: /tɒnˈkɪn
 
/
A mountainous region of northern Vietnam, centred on the delta of the Red River.

Definition of Tonkin in:

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Word of the day dinkum
Pronunciation: ˈdɪŋkəm
adjective
(of an article or person) genuine, honest, true