Phonotactics (in Greek phone = voice and taktikos = something which may be arranged or ordered) is a branch of phonology that deals with restrictions in a language on the permissible combinations of phonemes. Phonotactics defines permissible syllable structure, consonant clusters, and vowel sequences by means of phonotactical constraints. Phonotactic constraints are language specific. For example, in Japanese, consonant clusters like are not allowed, although they are in English. Similarly, the… (More on Phonotactics)