Definition of ない内に (ないうちに)
うち
                        ない内に
ないうちに
naiuchini
expression
•
                
before it becomes (verb), before (an undesirable thing occurs)(usually kana)(after neg. stem of verb)
Other readings:
                ないうちに《無い内に》
                Related Kanji
| 内 | inside, within, between, among, house, home | 
| 無 | nothingness, none, ain't, nothing, nil, not |