vital, necessary, crucial, needful, essential, basic, key, fundamental
Indispensible
The word imperative is an adjective. It is another word for essential.
what
Indispensable
The help I receive from Wiki Answers is indispensable to my assignment
The volunteer help was indispensable to increasing the hospital's productivity and community image.
dispense in- means not able- means capable dispense- means supply or distribute The entire word means not able to distribute
Some words that mean vital are essential, integral, critical, key, and fundamental. Additional words for vital are indispensable, significant, and necessary.
The prefix that can be added to "dispensable" is "in-", to create the word "indispensable."
Oh shut up.
Judy, Judy, Judy...
Yes, the noun 'necessity' is an abstract noun, a word for something deemed indispensable; a word for a concept.