The document discusses stress and syllables in English words. It explains that stressed syllables are louder, longer, higher in pitch, and have a different quality than unstressed syllables. Words can have primary stress, secondary stress, or be unstressed. The placement of stress in words depends on factors like the number of syllables, grammatical category, and phonological structure. Complex words formed from affixes or compounds may have stress shifted or placed on different components. Exceptions to stress rules are also discussed.