$deltok
From Scriptwiki
Deletes the Nth token from text or a range of tokens.
$deltok(text,N-N2,C)
Note that you can specify a negative value for N.
Example
echo -a $deltok(This is a moo test,4,32)
This example will echo This is a test to your active window, as moo is removed from the text.
echo -a $deltok(This is a test for you,-2-1,32)
This example will also echo This is a test, as the last two words are removed from the text.