Sentence:  The parts of which the sentence may consist are either inflected words: the <WSD>noun</WSD> (substantive and adjective) and the verb, the participle which shares the nature of both, and the pronoun; or uninflected words: prepositions, adverbs, and conjunctions. 
Meaning of the word marked with <WSD> tags:  Either a word that can be used to refer to a person, animal, place, thing, phenomenon, substance, quality or idea, or a word that modifies or describes a previous word or its referent; a substantive or adjective, sometimes also including other parts of speech such as numeral or pronoun.