This is the 235th most frequent Russian word.
достаточно
"Достаточно" means "enough" or "sufficiently."
Here, 'достаточно' means 'enough' and describes having a sufficient quantity of time.
У меня достаточно времени, чтобы завершить проект.
I have enough time to complete the project.
In this context, 'достаточно' modifies the adjective 'умён' to indicate a sufficient degree of intelligence.
Ты был достаточно умён, чтобы найти решение.
You were smart enough to find the solution.
Here, 'достаточно' functions to describe the manner in which speaking loudly is adequately executed for clarity.