In the phonology of the Romanian language, the phoneme inventory consists of seven vowels, two or four semivowels (different views exist), and twenty consonants. In addition, as with other languages, other phonemes can occur occasionally in interjections or recent borrowings. Notable features of Romanian include two unusual diphthongs and and the central vowel . Vowels There are seven monophthongs in Romanian: The table below gives a series of word examples for each vowel. Although most of these vowels are relatively straightforward and similar or identical to those in many other languages, the close central unrounded vowel is uncommon as a phoneme and especially uncommon amongst Indo-European languages. According to , is phonetically open-mid somewhat retracted central , rather than mid central. Less frequent vowels ö In addition to the seven core vowels, in a number of words of foreign origin (predominantly French, but also German) the mid front rounded vowel (rounded Romanian ; example word: bleu 'light blue') and the mid central rounded vowel (rounded Romanian ; example word: chemin de fer 'Chemin de Fer') have been preserved, without replacing them with any of the existing phonemes. The borrowed words have become part of the Romanian vocabulary and follow the usual inflexion rules, so that the new vowels, though less common, could be considered as part of the Romanian phoneme set. Many Romanian dictionaries use in their phonetic descriptions to represent both vowels. Because they are not native phonemes, their pronunciation may fluctuate or they may even be replaced by the diphthong . In older French borrowings it has often been replaced by , , or , as in șofer ('driver', from French chauffeur), masor ('masseur', from masseur), and sufleor ('theater prompter', from souffleur). ü Similarly, borrowings from languages such as French and German sometimes contain the close front rounded vowel : ecru , tul , führer . The symbol used for it in phonetic notations in Romanian dictionaries is . Educated speakers usually pronounce it , but other realizations such as also occur. Older words that originally had this sound have had it replaced with , , or . For instance, Turkish kül became ghiul ('large ring'), Turkish tütün became tutun ('tobacco'), but tiutiun in the Moldavian subdialect, German Düse gave duză ('nozzle') and French bureau became birou ('desk', 'office'). Diphthongs and triphthongs According to Ioana Chițoran, Romanian has two diphthongs: and . As a result of their origin