Syntax:     WORD(string[,delims][,nth][,end_var][,start])

Defn: A CI evaluator function that performs general word
extraction. The default delims are a space, a comma,
a semicolon, an equals sign, left and right parentheses,
left and right brackets, single quote, double quote,
and tab. The default nth is 1; the default end_var is
no variable; the default start is 1.

Type: String

Example: word('file a=bb,old;rec=40,,f,ascii')
Result: 'file'

Example: word('file a=bb,old;rec=40,,f,ascii',,-4,j)
Result: '40', j=18