The root word <em>mit</em> means "send". The prefix that can be added to create a word meaning "to send across" is <em>Trans. </em>Adding this prefix the word <em>transmit</em> is formed which comes from the Latin <em>transmittere</em> which means "to send across, cause to go across, transfer". It is formed by the prefix<em> trans</em> which means across, and <em>mittere</em> which means to send.