Non-germane is a term used to describe information or ideas that are not relevant to a particular topic or discussion. The antonyms or opposite of non-germane are words such as relevant, pertinent, appropriate, fitting, applicable, material, and apropos. Relevant refers to information that is directly related to the matter at hand, while pertinent implies a direct connection between the subject and the material being discussed. Appropriate suggests that something is suitable or fitting for a particular purpose, and fitting implies a sense of harmony or agreement with the topic. Material and apropos both suggest that something is relevant and significant to the subject being discussed.