join "", @splitted_word;
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I splitted an array containig a word because I needed to change some of the elements, (some letters)

You actually split a scalar containing a word into an array.

Have you tried using the substitution or transliteration operators?

use strict;
use warnings;

my $Tne_Word = 'antidisestablishmentarianism';
my @splitted_word = split(//, $Tne_Word);

{
  local $"='';
  print @splitted_word, "\n";
}
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use strict;
use warnings;

my $Tne_Word = 'antidisestablishmentarianism';
my @splitted_word = split(//, $Tne_Word);

{
  local $"='';
  print "@splitted_word\n";
}
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Not quite. That should be

{ local $,=''; local $\="\n"; print( @splitted_word ); }
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or

{ local $"=''; print( "@splitted_word\n" ); }
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See $,, $\ and $".

However, using join is less error-prone, more natural, shorter and more versatile (you can use it when you don't want to print).

print( join( '', @splitted_word ), "\n" );
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Ikegami: Thanx for your input a variation ofyourline of code did the trick @Make_Whole = join( '', @splitted_word ); I had tried the following prior to posting for help and hadnt work: @Make_Whole = join( //, @splitted_word ); It did work with commas however thanx again VirtualWeb

You changed the value of the $" variable but  print @splitted_word, "\n"; doesn't use the $" variable.   It does however use the $, and $\ variables.

Thanks for the correction jwkrahn and ikegami. The above response was obviously a bit too hasty. I intended ikegami's second variant. But it is probably better to use join, since the behavior does not rely on interpolation.
I updated the code to correct the error.