essential

US /ɪˈsɛnʃəl/

UK /ɪ'senʃl/

B1TOEIC
adj.AdjectiveExtremely or most important and necessary
It is essential that you write your name on your test paper
adj.AdjectiveFundamental; basic.
The essential point is that we need to act now.
n.NounA concentrated hydrophobic liquid containing volatile aroma compounds from plants.
Lavender essential oil is known for its calming properties.

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