The term 'Groove Narrow' is composed of two words: Groove and Narrow. Groove is a noun that refers to a long, narrow cut or depression in a surface, while Narrow is an adjective that describes something that is not wide. The crossword solution for this term is STRIA, which is a noun that refers to a thin, narrow line or groove, especially one of many parallel lines or grooves on the surface of a rock or other geological formation.