
There exist in the language negative indefinites which preclude the second negative marker of clausal negation. The second negative marker will be the one which comes linearly second. In such a language, while an ordinary sentence contains two negative markers, a sentence with a negative indefinite like <i>nothing</i> will only have the first.<br><br>

An example comes from Maltese. An ordinary negative sentence has a negative marker preceding the finite verb (Neg1) and another suffixed to it (Neg2). However, when the indefinite negative <i>xejn</i> is used, the second marker is not used. 

<br><br><i>From Haspelmath (2008)</i><br>
Patricia <b>ma</b> rat<b>-x</b> lit-tifel <br>
P. <b>Neg1</b> she.saw<b>-Neg2</b> ACC.the-boy
<br><br>
Patricia <b>ma</b> rat(<b>*-x</b>) xejn <br>
P. <b>Neg1</b> she.saw(<b>*-Neg2</b>) nothing
<br><br>

Note:</b> Languages which do not use bipartite negation will be marked <b>N/A</b> for this property. There is a corresponding property for such languages. 
<br><br><b>Reference</b><br>
Haspelmath, Martin. 2008. Negative Indefinite Pronouns and Predicate Negation.
In Haspelmath et al. (2008), chapter 115. Available online at <a href=â€http://wals.info/feature/115â€> http://wals.info/feature/115</a href>. 
