English
[1] [n] mouth [2] open end; opening [3] entrance; gate (especially in the Great Wall or city walls) [4] [n] person [5] a certain article (as a cistern, a big jar, etc) [6] [n] edge or blade of a knife [7] [n] crack

Mandarin (hanyu pinyin)
kǒu

Cantonese (jyutping)
hau²

Hakka (phonetic)
[Kwangtung] heu³ k'eu³ [Hailu] heu³ k'ieu³ [Siyan] heu³ k'ieu³ [Hong Kong] heu³ k'ieu³ [Dongguan] k'eu³ [Meixian] k'eu³ heu⁵ [Bao'an] k'iu³ hiu³

Minnan/Taiwanese
khau2

Vietnamese
khẩu

Japanese
kou ku

Korean
kwu