The simplest definition of risk is “the effect of uncertainty on objectivesISO 31000”.
Risk management is the identification, assessment, and prioritization of risks followed by coordinated and economical application of resources to minimize, monitor, and control the probability and/or impact of unfortunate eventsHubbard, Douglas (2009). The Failure of Risk Management: Why It’s Broken and How to Fix It. John Wiley & Sons. p. 46. or to maximize the realization of opportunities. Risk management’s objective is to assure uncertainty does not deflect the endeavor from the business goals.Antunes, Ricardo; Gonzalez, Vicente (3 March 2015). A Production Model for Construction: A Theoretical Framework”. Buildings 5 (1): 209–228.
You can never protect yourself 100%. What you do is protect yourself as much as possible and mitigate risk to an acceptable degree. You can never remove all risk.