Emerson attempted to define the philosophy in simple terms as "What is popularly called Transcendentalism among us is Idealism; Idealism as it appears in 1842. It is much larger than this.” How is the philosophy described further on in this paragraph?

An adverb clause is the answer?

Syllable added to a root word to change its meaning : affixan independent word--example run,walk,book : free morphemeaffix that gives grammatical meaning such as tense or number : inflectiona word part that must attach to a word in order to be usable : bound morphemedegree of comparison formed by adding -er or more to an adjective : comparativedegree of comparison formed by adding -est or most to an adjective : superlativeaffix added to the beginning of a word : prefixaffix added to the end of a word : suffixroot word of lovable : lovetwo roots used together to form one word : combining form