A more thorough explanation:

Term: idoneus
Definition: Idoneus is a Latin word that means appropriate or suitable. It was used in Roman law to describe a person or thing that was considered responsible or solvent. For instance, a man who was responsible and could be trusted was known as an idoneus homo. Similarly, a pledge that provided enough security was called idonea cautio. In simple terms, idoneus refers to something or someone that is a good fit for a particular situation or purpose. For example, if a company is looking for a candidate to fill a job position, they will look for someone who is idoneus for the role, meaning someone who has the necessary skills and experience to do the job well.