Noun
Casual choice; fortuitous selection; hazard.
Source: Webster's dictionaryThis phenomenon occurs because voiced fricatives have developed from lenition of plosives or fortition of approximants. Source: Internet
This started out in nonstandard dialects and was restricted to the beginning of prosodic units (a common position for fortition ), but has expanded to many speakers of the standard language to the beginnings of common words even within prosodic units. Source: Internet