In linguistics, word order (also known as linear order) is the order of the syntactic constituents of a language. Word order typology studies it from a cross-linguistic perspective, and examines how different languages employ different orders. Correlations between orders found in different syntactic sub-domains are also of interest. The primary word orders that are of interest are the constituent order of a clause, namely the relative order of subject, object, and verb; the order of modifiers (adjectives, numerals, demonstratives, possessives, and adjuncts) in a noun phrase; the order of adverbials. Some languages use relatively fixed word order, often relying on the order of constituents to convey grammatical information. Other languages—often those that convey grammatical information through inflection—allow more flexible word order, which can be used to encode pragmatic information, such as topicalisation or focus. However, even languages with flexible word order have a preferred or basic word order, with other word orders considered "marked". Constituent word order is defined in terms of a finite verb (V) in combination with two arguments, namely the subject (S), and object (O). Subject and object are here understood to be nouns, since pronouns often tend to display different word order properties. Thus, a transitive sentence has six logically possible basic word orders: about half of the world's languages deploy subject–object–verb order (SOV); about one-third of the world's languages deploy subject–verb–object order (SVO); a smaller fraction of languages deploy verb–subject–object (VSO) order; the remaining three arrangements are rarer: verb–object–subject (VOS) is slightly more common than object–verb–subject (OVS), and object–subject–verb (OSV) is the rarest by a significant margin. Constituent word orders These are all possible word orders for the subject, object, and verb in the order of most common to rarest (the examples use "she" as the subject, "loves" as the verb, and "him" as the object): SOV is the order used by the largest number of distinct languages; languages using it include Japanese, Korean, Mongolian, Turkish, the Indo-Aryan languages and the Dravidian languages. Some, like Persian, Latin and Quechua, have SOV normal word order but conform less to the general tendencies of other such languages. A sentence glossing as "She him loves" would be grammatically correct in these languages. SVO languages include English, Bulgarian, Macedonian, Serbo-Croatian, the Chinese languages and Swahili, among others. "She loves him." VSO languages include Classical Arabic, Biblical Hebrew, the Insular Celtic languages, and Hawaiian. "Loves she him." VOS languages include