1. just enough (of sth) for the task
have/had/got an adequate amount of sth
Adequate is an adjective that means the minimum amount of something that's needed. It could be used to talk about physical resources: "We don't have an adequate amount of food and water for all of the families affected by the disaster." It can also be used to talk about intangible things like skills: "We need to ensure everyone has adequate knowledge to operate the machine safely." This is a word you will hear in mostly in formal and business contexts.