-letters
a character representing one or more of the sounds used in speech

these no longer fit together to form the words i need to talk to you

-words
a single distinct meaningful element of speech or writing, used with other words to form a sentence

these seemingly simple elements of speech don't seem to work together to become the sentences i want to say to you

-sentences
a set of words that is complete in itself

i look at you and suddenly my mind is no longer capable of putting together the sentences i long to give you