Extreme
Excessive
mild
insignificant or moderate
Excess
opposites: cheerful, elated, excited, exhilarated, happy, pleased , calm, mild, moderate, peaceful, quiet
Moderate as an adjective means average in quality, intensity, amount, or degree. As the opposite of this definition of moderate would be extreme, moderate and extreme are antonyms.
calm, moderate, small, unpretentious
cheap, thrifty, moderate, plain
The temperature here is moderate for most of the year.
what word is opposite of prudent
The opposite of anything is it's absence. Silence would be the opposite of a word spoken.
moderate
median
For extreme (immoderate), the opposite would be moderate, limited, or mild. For extreme (extraordinary), the opposite would be average, ordinary, or tame. For extreme (severe), the opposite would be mild, slight, or minimal.