In metrics, the emphasis given a syllable in articulation. Perhaps no aspect of prosody ahs been the subject of greater disagreement then that dealing with accent; it is considered to be a matter of force, timbre, duration, loudness, pitch, and various combinations of these. Customarily, however, it is used to describe some aspect of emphasis, as opposed to duration or quantity. A distincion is sometimes made betweeen accent as the normal emphasis and stess as the empasis required by the meter. The governing force of metrical perscription on how one reads is amatter of critical debate, involving the issue of rhythm. In versification, accent usually implies contrast' that is, a pattterend succession of opposites, in this case, accented and unaccented syllables. In traditional terminology ictus is the naem applied to the stress itself, arsis the name applited to the stressed syllabe, and thesis the aname appled ot the unstressed sybllable. The Greek usage, however, predating this Latin usage, appplied thesis to the stressed and arsis to the umstressd syllables. There are three basic types of accent in Enlgish: word accent or the normal stress on syllables; rhetorical accent, in which the placement of stress is determined by the meaing of the sentence; and rhytmic pattern of the line. If the metrical accent does violence to the word accent, the resulting alteration in pronunciation is called wrenched accent, a phenomenon common in the folk ballad. In lingustices, accent refers to the pronuncaistion of words adn pharases according regions and/ or soical pattterns.