In linguistics, content words are words that possess semantic content and contribute to the meaning of the sentence in which they occur. In a traditional approach, nouns were said to name objects and other entities, lexical verbs to indicate actions, adjectives to refer to attributes of entities and adverbs, to attributes of actions. They contrast with function words, which are words that have very little substantive meaning and primarily denote grammatical relationships between content words, such as prepositions (in, out, under, etc.), pronouns (I, you, he, who, etc.), conjunctions (and, but, till, as, etc.), etc.[1]