In
English, the initial
g of
giga can be pronounced
/ˈɡɪɡə/ (a hard
g as in
giggle), or
/ˈdʒɪɡə/ (a soft
g as in
giant, like a
j sound, which shares its Greek root).
[4]
This latter pronunciation was formalised within the United States in the 1960s and 1980s with the issue by the US
National Bureau of Standards of pronunciation guides for the metric prefixes.
[5] A prominent example is found in the pronunciation of
gigawatts in the 1985 film
Back to the Future.
According to the American writer Kevin Self, a German committee member of the
International Electrotechnical Commission proposed
giga as a prefix for 109 in the 1920s, drawing on a verse (evidently "Anto-logie") by the German humorous poet
Christian Morgenstern that appeared in the third (1908) edition of his
Galgenlieder (Gallows Songs).
[6][7] This suggests that a hard German
[ɡ] was originally intended as the pronunciation. Self was unable to ascertain when the /dʒ/ (soft
g) pronunciation came into occasional use, but claimed that as of 1995 it had returned to /ɡ/ (hard
g).
[8][9]
In 1998, a poll by the phonetician
John C. Wells found that 84% of Britons preferred the pronunciation of
gigabyte starting with /ɡɪ/ (as in
gig), 9% with /dʒɪ/ (as in
jig), 6% with /ɡaɪ/ (
guy), and 1% with /dʒaɪ/ (as in
giant).
[10]