inheritance comes first, followed by Romance and classical Latin neologisms, whereas the Slavic borrowings come third. Romanian has a lexical similarity of 77% with Italian, 75% with French, 74% with Sardinian, 73% with Catalan, 72% with Portuguese and Rheto-Romance, 71% with Spanish. Although they are rarely used nowadays, the Romanian calendar used to have the traditional Romanian month names, unique to the language. The longest word in Romanian is , with 44 letters, but the longest one admitted by the Dicționarul explicativ al limbii române ("Explanatory Dictionary of the Romanian Language", DEX) is , with 25 letters. Grammar Romanian nouns are characterized by gender (feminine, masculine, and neuter), and declined by number (singular and plural) and case (nominative/accusative, dative/genitive and vocative). The articles, as well as most adjectives and pronouns, agree in gender, number and case with the noun they modify. Romanian is the only Romance language where definite articles are enclitic: that is, attached to the end of the noun (as in Scandinavian, Bulgarian and Albanian), instead of in front (proclitic). They were formed, as in other Romance languages, from the Latin demonstrative pronouns. As in all Romance languages, Romanian verbs are highly inflected for person, number, tense, mood, and voice. The usual word order in sentences is subject–verb–object (SVO). Romanian has four verbal conjugations which further split into ten conjugation patterns. Verbs can be put in five moods that are inflected for the person (indicative, conditional/optative, imperative, subjunctive, and presumptive) and four impersonal moods (infinitive, gerund, supine, and participle). Phonology Romanian has seven vowels: , , , , , and . Additionally, and may appear in some borrowed words. Arguably, the diphthongs and are also part of the phoneme set. There are twenty-two consonants. The two approximants and can appear before or after any vowel, creating a large number of glide-vowel sequences which are, strictly speaking, not diphthongs. In final positions after consonants, a short can be deleted, surfacing only as the palatalization of the preceding consonant (e.g., ). Similarly, a deleted may prompt labialization of a preceding consonant, though this has ceased to carry any morphological meaning. Phonetic changes Owing to its isolation from the other Romance languages, the phonetic evolution of Romanian was quite different, but the language does share a few changes with Italian, such as → (Lat. clarus → Rom. chiar, Ital. chiaro, Lat. clamare → Rom. chemare, Ital. chiamare) and → (Lat. *glacia