necessary; indispensable; most important
relating to sb's/sth's basic nature; fundamental
fundamentally necessary element or thing
sth that is necessary
"food and shelter are necessities of life"
"the essentials of the good life"
"allow farmers to buy their requirements under favorable conditions"
"a place where the requisites of water fuel and fodder can be obtained"
"essential tools and materials"
"funds essential to the completion of the project"
"an indispensable worker"
"the essential feature"
"the all-important subject of disarmament"
"in chess cool nerves are of the essence"
The love of God is essentiall happiness.
出自： W. Sparrow