Although the Bantu language may, as some suppose[139], have originated in the north and spread southwards to the Congo, Zambesi, and Limpopo basins, it cannot now be even remotely affiliated to any one of the numerous distinct forms of speech current in the Sudanese domain. Hence to allow time for its diffusion over half the continent, the initial movement must be assigned to an extremely remote epoch, and a corresponding period of great duration must be postulated for the profound linguistic disintegration that is everywhere witnessed in the region between the Atlantic and Abyssinia. Here agglutination, both with prefixed and postfixed particles, is the prevailing morphological order, as in the Mandingan, Fulah, Nubian, Dinkan, and Mangbattu groups. But every shade of transition is also presented between true agglutination and inflection of the Hamito-Semitic types, as in Hausa, Kanuri, Kanem, Dasa or Southern and Teda or Northern Tibu[140]. Elsewhere, and especially in Upper Guinea, the originally agglutinating tongues have developed on lines analogous to those followed by Tibetan, Burmese, Chinese, and Otomi in other continents, with corresponding results. Thus the Tshi, Ewe, and Yoruba, surviving members of a now extinct stock-language, formerly diffused over the whole region between Cape Palmas and the Niger Delta, have become so burdened with monosyllabic homophones (like-sounding monosyllables), that to indicate their different meanings several distinguishing tones have been evolved, exactly as in the Indo-Chinese group. In Ewe (Slave Coast) the root _do_, according as it is toned may mean to put, let go, tell, kick, be sad, join, change, grow big, sleep, prick, or grind. So great are the ravages of phonetic decay, that new expedients have been developed to express quite simple ideas, as in Tshi (Gold Coast) _addanmu_, room (_addan_ house, _mu_ interior); _akwancherifo_, a guide (_akwan_ road, _cheri_ to show, _fo_ person); _ensahtsiabah_, finger (_ensah_ hand, _tsia_ small, _abbah_ child = hand's-little-child); but middle-finger = "hand's-little-chief" (_ensahtsiahin_, where _ehin_ chief takes the place of _abbah_ child[141]).