The <b>prohibitive</b> is a negative imperative, as in English <i>Don't do that!</i> 

<br><br>A ‘yes’ value indicates that the language in question forms prohibitives by adding a special, non-sentential negation morpheme to a form of the verb which is <b>not</b> used for the imperative. <br><br>Zulu is such a language. For example, an example of an imperative <i>Shay-a inja</i> ‘hit-imp.2sg dog’ for ‘hit the dog!’ The prohibitive, however, attaches the agreement suffix to a special negation marker <i>mus-</i> followed by the infinitive form of the verb, as in <i><b>mus-a</b> uku-shay-a inja</i> ‘NEG.IMP.AUX-2sg INF.hit.INF dog’ for ‘Don’t hit the dog!’ In contrast, the indicative negative is indicated with the prefix <i>a-</i> and suffix <i>-i</i>, as in <i><b>A-</b>wu-shay<b>-i</b> inja</i> ‘NEG.IND.PRES-2sg-hit-NEG.IND.PRES dog’ for ‘You do not hit the dog’ (van der Auwera et al. 2008). 

<br><br>Some languages have more than one prohibitive strategy. In such cases, languages are marked ‘yes’ for each prohibitive strategy used. 

<br><br><b>Reference</b><br>

van der Auwera, Johan, Ludo Lejeune & Valentin Goussev. 2008. The Prohibitive.
In Haspelmath et al. (2008), chapter 73.
Available online at <a href=â€http://wals.info/feature/73â€> http://wals.info/feature/73</a href>.
