IPA: /ˈædɪkwət/
KK: /ˈædɪkwɪt/
Enough to meet a certain standard or requirement, but not more than what is necessary.
The resources provided were adequate for the project.
Comparative: more adequate
Superlative: most adequate
Adequate is derived from the Latin 'ad' (meaning to) and 'aequare' (meaning to make equal). The word describes something that is sufficient or equal to the task at hand.
Think of something being 'made equal' ('aequare') to a requirement — that's why adequate means sufficient for a purpose.