essential
adjective
[ ɪˈsɛnʃ(ə)l ]
• absolutely necessary; extremely important.
• "it is essential to keep up-to-date records"
Similar:
crucial,
necessary,
key,
vital,
indispensable,
needed,
required,
called for,
requisite,
important,
all-important,
vitally important,
of the utmost importance,
of great consequence,
of the essence,
critical,
life-and-death,
imperative,
mandatory,
compulsory,
obligatory,
compelling,
urgent,
pressing,
burning,
acute,
paramount,
pre-eminent,
high-priority,
significant,
consequential,
• (of a disease) with no known external stimulus or cause; idiopathic.
• "essential hypertension"
essential
noun
• a thing that is absolutely necessary.
• "we only had the bare essentials in the way of equipment"
Similar:
necessity,
necessary/essential item,
prerequisite,
requisite,
requirement,
need,
condition,
precondition,
specification,
stipulation,
qualification,
desideratum,
sine qua non,
must,
Origin:
Middle English (in the sense ‘in the highest degree’): from late Latin essentialis, from Latin essentia (see essence).