Making certain that something will happen or be the case; guaranteeing a particular outcome.
From Old French 'enseurer,' from 'en-' (in) + 'seur' (sure), from Latin 'securus' (secure). Developed the sense of making certain or guaranteeing by the 14th century.
The word 'ensuring' reflects humanity's deep desire to control uncertainty - we've created entire industries around ensuring outcomes, from insurance to quality control. Yet the word itself acknowledges that we can only make things more likely, not absolutely certain.
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