To make certain that something happens or is true.
“Please ensure that your membership form is signed before submitting it to the front desk.”
“To ensure eligibility for the senior discount, applicants must present valid photo identification.”
In Part 2 diagrams, 'ensure' often appears in instructions telling readers what steps guarantee eligibility or compliance, such as 'applicants must ensure all documents are submitted.' Recognizing this word helps you spot mandatory actions in flowcharts and tables, which are frequently tested in the questions. It usually signals a required condition rather than an optional one, so treat it as a strong clue.
Synonyms: guarantee, make certain, confirm