(from tap) has a short a , which is distinct from the diphthongal long a in taping (from tape). In Standard Modern Greek, doubled orthographic consonants have no phonetic significance at all. Hangul (the Korean alphabet) and its romanizations also use double consonants, but to indicate fortis articulation, not gemination. In Klallam, a sequence of two sounds such as in a word like 'sleep' is not pronounced like a geminated stop with a long closure duration – rather the sequence is pronounced as a sequence of two individual sounds such that the first is released before the articulation of the second . See also Syntactic gemination West Germanic gemination Glottal stop Length (phonetics) Vowel length Syllabic consonant Index of phonetics articles References Consonants Phonetics