This is the 97th most frequent Indonesian word.
cukup
"Enough" or "sufficient."
Here, 'cukup' is used to express a moderate amount, meaning 'quite' or 'fairly'.
Saya merasa cukup lapar hari ini.
I feel quite hungry today.
Here, 'cukup' signifies an adequate degree, meaning 'enough' or 'to a sufficient extent'.
Jika kamu cukup belajar, pasti akan lulus ujian.
If you study enough, you will surely pass the exam.
In this case, 'cukup' means 'sufficient' or 'enough' to indicate adequacy.