essential condition; prerequisite; must-have requirement
A condition that must be met; used in formal, business, and everyday contexts.
English proficiency is an essential condition for this job.
成功の必須条件は、継続的な努力だ。
The essential condition for success is continuous effort.
Being able to speak English is a prerequisite for applying.
This applicant meets the essential requirements.
We make a university degree a mandatory requirement for hiring.