Barack Obama had a profound effect on the U.S.A.
bottomless, deep, learned, heavy
Deep, erudite, intellectual
The suffix of "profound" is "-found" and the root word is "profundus," which means deep or thorough in Latin. "Profound" itself means deep, intense, or insightful.
That is the correct spelling of "profound" (deep, meaningful).
The word profound is an adjective. It means very deep or serious.
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Profound
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"Deep" typically refers to something with great complexity, significance, or intensity. "Profound" usually describes insights, emotions, or experiences that are very deep or insightful in nature, often touching on fundamental truths or wisdom.
Dictionary.com has a great definition for it ( I personally like the third one): http://www.dictionary.reference.com/browse/profound
Invertebrates found in the deeper zones of the body of water, usually where there is no effective light penetration.