grammatischer
Grammatischer is the masculine nominative singular inflected form of the German adjective grammatisch, meaning grammatical or related to grammar. In German, adjectives are declined to reflect case, number, gender, and the presence or absence of a determiner. Grammatischer commonly appears in contexts where there is no definite article or when using strong declension, for example in the phrase ein grammatischer Fehler (a grammatical error). With a definite article, the ending changes and the corresponding form would be different, such as der grammatische Fehler (the grammatical error).
Etymology and meaning: The adjective grammatisch derives from the word grammar and ultimately from the Greek
Usage: Grammatischer functions as a attributive adjective in everyday German and in technical or educational writing
Related terms: Grammatik (grammar), grammatikalisch (grammatical in a somewhat more formal or broader sense), and other
Examples: Ein grammatischer Fehler. Der grammatische Aufbau des Satzes. These illustrate how grammatischer fits the masculine