ńnú prep /ŋ́.nṹ/
Definitions
  1. inside
    Òjò ń rọ̀, ṣeré ńnú ilé. It's raining, play inside the house.
Etymology
Contraction of nínú (“inside”), from ní inú
Source: Wiktionary, where this word is spelled “nnu”. Reference: en-nnu-yo-prep-EGsIYiSk