Concatenate word of a column with every other words from other column python : <p>Here is the dataset</p>

<pre><code>pd.DataFrame({'Word':['Iron','copper','nickel'],'Sentence':['An Apple a day','Roses are red','Skies are blue']})
</code></pre>

<p>I'm trying to concatenate one word with every other word and append that into a new column such that my output will look like</p>

<pre><code>     Word        Sentence                         New_Sentence
0    Iron  An Apple a day   An_Iron Apple_Iron a_Iron day_Iron
1  copper   Roses are red   Roses_copper are_copper red_copper
2  nickel  Skies are blue  skies_nickel are_nickel blue_nickel
</code></pre>

<p>Any suggestions?</p>
