indispensable
Translation
essential, absolutely necessary
Examples
A good dictionary is indispensable for learning a language.
A good dictionary is indispensable for learning a language.
She became indispensable to the team.
She became indispensable to the team.
Grammar Patterns
indispensable ((for sth.)) essential for something A good dictionary is indispensable for learning a language.
indispensable ((to sb./sth.)) essential to someone or something She became indispensable to the team.
Similar Words
Synonyms: essential, vital, crucial; Antonyms: dispensable, unnecessary, non-essential
Etymology
From the prefix 'in-' (not) + 'dispensable' (able to be done without). So, literally 'not able to be done without'.
Memory Tips
Think 'in-dispensable' = 'not dispensable'. If you can't 'dispense' with it, you absolutely need it.