Chinese
|  | 
 one; 1; single one; 1; single; a; (before verbs) as soon as, once; (before a noun) entire (family, etc.) | mouth; (a measure word, for people, livestock or utensils) | 
| simp. and trad. (一口)
 | 一 | 口 | 
Noun
一口 
-  one + the classifier 口: one mouthful; one bite; one sip; one item
-  
- 
講一口純正的英語 [MSC, trad.]
- 
讲一口纯正的英语 [MSC, simp.]
- 
jiǎng yīkǒu chúnzhèng de yīngyǔ [Pinyin]
- speak pure English
 
 
Adverb
一口
-  flatly; readily (deny/admit with one sentence)