What are proper nouns in this sentence and should be capitalized ? their brother, fred, went rafting on the colorado river last summer

In this sentence Fred and Colorado River are proper nouns since they refer to a particular place or person

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

David is melinda's lab partner in biology and he's in her social studies class. i think melinda is kinda of his friend.