なくてはならない

無くてはならない

表記・読み：なくてはならない

1. 1

   cannot do without something; indispensable; absolutely necessary

   expressions (phrases, clauses, etc.)い形容詞word usually written using kana alone
2. 2

   have to do

   expressions (phrases, clauses, etc.)い形容詞after negative base of verbword usually written using kana alone