Adjective may be more rigid in some languages than others; in some, like Spanish, it may only be a default ("unmarked") word order, with other orders being permissible. Other languages, such as Tagalog, follow their adjectival orders as rigidly as English. The normal adjectival order of English may be overridden in certain circumstances, especially when one adjective is being fronted. In addition, the usual order of adjectives in English would result in the phrase "the bad big wolf" (opinion before size), but instead the usual phrase is "the big bad wolf", perhaps because the ablaut reduplication rule that high vowels precede
Adjective adjectives are not easily derived. Similarly, native Japanese adjectives ("i"-adjectives) are considered a closed class (as are native verbs), although nouns (an open class) may be used in the genitive to convey some adjectival meanings, and there is also the separate open class of adjectival nouns ("na"-adjectives). Many languages, including English, distinguish between adjectives, which qualify nouns and pronouns, and adverbs, which mainly modify verbs, adjectives, and other adverbs. Not all languages have exactly this distinction and many languages, including English, have words that can function as both. For example, in English, "fast" is an adjective in "a fast car"