cockneyism การใช้

The sound change originally occurred in southern England, and ultimately changed the sound of to in some words in which the former sound appeared before, leading to RP for " path " and for " sample ", etc . The sound change did not occur before other consonants; thus accents affected by the split preserve in words like " cat " . ( See the Variations section below for more details on the words affected . ) The lengthening of the " bath " vowel began in the 17th century but was " stigmatised as a Cockneyism until well into the 19th century ".