にゅっと

にゅっと, にゅうっと, ニュッと, にょっと, ニョッと, ニュウッとnyutto

adverb

  1. suddenly (stick out, appear, extend, etc.)
  2. abruptly (protrude)
  3. unexpectedly

Study it in Yanamino

Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences