auxil'iary, Lat. auxiliaris, from auxilium, help, aid: a verb used to assist in conjugating other verbs.
case, Lat. casus, from cadere, to fall, to happen: a grammatical form denoting the relation of a noun or pronoun to some other word in the sentence.
clause, Lat. claudere, clausum, to shut: a dependent proposition introduced by a connective.
compar'ison, Lat. comparatio, from comparare, to liken to: a variation in the form of an adjective or adverb to express degrees of quantity or quality.
com'plement, Lat. complementum, from con and plere, to fill fully: the word or words required to complete the predication of a transitive verb.
com'plex (sentence), Lat. complexus, from con and plectere, to twist around: a sentence consisting of one independent proposition and one or more clauses.
com'pound (sentence), Lat. componere (= con and ponere), to put together: a sentence consisting of two or more independent propositions.
conjuga'tion, Lat. conjugatio, from con and jugare, to join together: the systematic arrangement of a verb according to its various grammatical forms.
conjunction, Lat. conjunctio, from con and jungere, to join together: a word used to connect sentences or the elements of sentences.
declen'sion, Lat. declinatio, from declinare, to lean or incline: the process of giving in regular order the cases and numbers of a noun or pronoun.