<emphasis>

The emphasis element requests that the contained text be spoken with prominence or stress.

<?xml version="1.0"?>
<speak version="1.0" xmlns="http://www.w3.org/2001/10/synthesis"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://www.w3.org/2001/10/synthesis
                   http://www.w3.org/TR/speech-synthesis/synthesis.xsd"
         xml:lang="en-US">

  That is a <emphasis> big </emphasis> car!
  That is a <emphasis level="strong"> huge </emphasis> bank account!
</speak>

Attributes

level

Optional. Specifies the the strength of emphasis to be applied. Valid values include "strong", "moderate" (default), "none" and "reduced".

Children

<audio>, <break>, <emphasis>, <mark>, <phoneme>, <prosody>, <say-as>, <sub>, and <voice>.

Parents

<audio>, <emphasis>, <p>, <prosody>, <s>, <speak>, and <voice>.

Source: Speech Synthesis Markup Language (SSML) Version 1.0