having great power or force or potency or effect(adj.all)
Example: The most powerful government in western Europe.
His powerful arms.
A powerful bomb.
The horse's powerful kick.
Powerful drugs.
A powerful argument.
Full of power; capable of producing great effects of any kind; potent; mighty; efficacious; intense; as, a powerful man or beast; a powerful engine; a powerful argument; a powerful light; a powerful vessel.(adjective)
source: webster1913
adverb (r)
(Southern regional intensive) very; to a great degree(adv.all)
Example: It is powerful humid.
That boy is powerful big now.