tng2 'cause to break'. Also, 毒 in Taiwanese Southern Min has two pronunciations: to̍k (entering tone) means 'poison' or 'poisonous', while thāu (departing tone) means 'to kill with poison'. The same usage can be found in Min, Yue, and Hakka. Neutralisation Uses of tone In East Asia, tone is typically lexical. That is, tone is used to distinguish words which would otherwise be homonyms. This is characteristic of heavily tonal languages such as Chinese, Vietnamese, Thai, and Hmong. However, in many African languages, especially in the Niger–Congo family, tone can be both lexical and grammatical. In the Kru languages, a combination of these patterns is found: nouns tend to have complex tone systems but are not much affected by grammatical inflections, whereas verbs tend to have simple tone systems, which are inflected to indicate tense and mood, person, and polarity, so that tone may be the only distinguishing feature between "you went" and "I won't go". In colloquial Yoruba, especially when spoken quickly, vowels may assimilate to each other, and consonants elide so much that much of the lexical and grammatical information is carried by tone. In languages of West Africa such as Yoruba, people may even communicate with so-called "talking drums", which are modulated to imitate the tones of the language, or by whistling the tones of speech. Note that tonal languages are not distributed evenly across the same range as non-tonal languages. Instead, the majority of tone languages belong to the Niger-Congo, Sino-Tibetan and Vietic groups, which are then composed by a large majority of tone languages and dominate a single region. Only in limited locations (South Africa, New Guinea, Mexico, Brazil and a few others) do tone languages occur as individual members or small clusters within a non-tone dominated area. In some locations, like Central America, it may represent no more than an incidental effect of which languages were included when one examines the distribution; for groups like Khoi-San in Southern Africa and Papuan languages, whole families of languages possess tonality but simply have relatively few members, and for some North American tone languages, multiple independent origins are suspected. If generally considering only complex-tone vs. no-tone, it might be concluded that tone is almost always an ancient feature within a language family that is highly conserved among members. However, when considered in addition to "simple" tone systems that include only two tones, tone, as a whole, appears