Initial-stress-derived noun

Initial-stress derivation is a phonological process in English that moves stress to the first syllable of verbs when they are used as nouns or adjectives. (This is an example of a suprafix.) This process can be found in the case of several dozen verb-noun and verb-adjective pairs and is gradually becoming more standardized in some English dialects, but it is not present in all. The list of affected words differs from area to area, and often depends on whether a word is used metaphorically or not. At least 170 verb-noun or verb-adjective pairs exist. Some examples are: record. as a verb, "Remember to recórd the show!". as a noun, "I'll keep a récord of that request." permit. as a verb, "I won't permít that." as a noun, "We already have a pérmit." In English, since the early modern period, polysyllabic nouns tend to have an unstressed final syllable, while verbs do not. Thus, the stress difference between nouns and verbs applies generally in English, not just to otherwise-identical noun-verb pairs. The frequency of such pairs in English is a result of the productivity of class conversion. When "re-" is prefixed to a monosyllabic word, and the word gains currency both as a noun and as a verb, it usually fits into this pattern, although, as the following list makes clear, most words fitting this pattern do not match that description. Many of these have first syllables that evolved from Latin prepositions, although again that does not account for all of them. See also list of Latin words with English derivatives. When the stress is moved, the pronunciation, especially of vowels, often changes in other ways as well. Most common is the reduction of a vowel sound to a schwa when it becomes unstressed.