ぬっと

1. 1suddenly (appear, stick out, etc.) ; abruptly (happen) ; unexpectedly ; looming (e.g. out of the dark) Translated by Jiyomi
2. 2(stand) still and expressionless ; imposingly ; menacingly Translated by Jiyomi
3. 3suddenly (stand up) ; abruptly (rise) Translated by Jiyomi

Other writings and readings

JMdict entry 2085870. Source and licence.