While typical sentence expresses truth, the falsity of statement should be additionally marked through negation. It can be done by various ways, be applied to various parts of sentence and occur in combination with any other type of sentence and grammatical mood.

Negation is usually done by adding prefix nar- which always precedes other prefixes except clitic pronouns of subject when joined to the verb.

Should not be mixed with expressions of absence (w/ genitive case).

Double negation may occur when sentence to be negated already has negative pro-form (like “nobody”, “nowhere”, etc.) For example English “Never return” may be converted into “Don't ever return” (flawed language but no pure grammatical errors), while Russian requires adding negative particle both to pronoun and verb (with literal translations “Never don't return” or more precisely “Never not return”). Nûrlâm does not have unified rules on double negation. However negative pro-form should go before the verb without negation, even if pro-form is an adverbial which usually placed after the verb. So translations “Naril kruskât”, “Narkruskât milkon”, “Narkruskât naril” and “Naril narkruskât” are all valid.