<P> In such languages with variable stress, stress may be phonemic in that it can serve to distinguish otherwise identical words . For example, the English words insight and incite are distinguished in pronunciation only by the fact that the stress falls on the first syllable in the former and on the second syllable in the latter . Other examples include umschreiben ("rewrite") vs. umschreiben ("paraphrase, outline") in German, за́мок ("castle") vs. замо́к ("lock") in Russian, and ancora ("anchor"), ancora ("more, still, yet") in Italian, and the triple example sábia ("wise woman"), sabia ("know"), sabiá ("type of bird") from Portuguese . English compound nouns can change their meaning based on stress, as with paper bág (a bag made of paper) and páper bag (a bag for carrying newspapers). </P> <P> Dialects of the same language may have different stress placement . For instance, the English word laboratory is stressed on the second syllable in British English (labóratory often pronounced "labóratry", the second o being silent), but the first syllable in American English, with a secondary stress on the "tor' syllable (láboratory often pronounced "lábratory"). The Spanish word video is stressed on the first syllable in Spain (vídeo) but on the second syllable in the Americas (vidéo). The Portuguese words for Madagascar and the continent Oceania are stressed on the third syllable in European Portuguese (Madagáscar and Oceânia), but on the fourth syllable in Brazilian Portuguese (Madagascar and Oceania). </P> <P> Some languages are described as having both primary stress and secondary stress . A syllable with secondary stress is stressed relative to unstressed syllables but not as strongly as a syllable with primary stress . As with primary stress, the position of secondary stress may be more or less predictable depending on language . In English, it is not fully predictable: the words organization and accumulation both have primary stress on the fourth syllable, but the secondary stress comes on the first syllable in the former word and on the second syllable in the latter . In some analyses, for example the one found in Chomsky and Halle's The Sound Pattern of English, English has been described as having four levels of stress: primary, secondary, tertiary, and quaternary, but the treatments often disagree with one another . </P> <P> Peter Ladefoged and other phoneticians have noted that it is possible to describe English with only one degree of stress, as long as unstressed syllables are phonemically distinguished for vowel reduction . They believe that the multiple levels posited for English, whether primary--secondary or primary--secondary--tertiary, are mere phonetic detail and not true phonemic stress, and often, the alleged secondary stress is not characterized by the increase in respiratory activity normally associated with primary stress in English or with all stress in other languages . (For further detail see Stress and vowel reduction in English .) </P>

What is a primary stress in english language
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