Meaning : In an abundant manner.
Example :
They were abundantly supplied with food.
He thanked her profusely.
Synonyms : abundantly, copiously, profusely
Meaning : In a wasteful manner.
Example :
The United States, up to the 1920s, used fuel lavishly, mainly because it was so cheap.
Synonyms : lavishly
Extravagantly ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. Extravagantly ka matlab kya hota hai?