Input (grade 5): The name is derived from the word okonomi, meaning "what you like" or "what you want", and yaki meaning "grilled" or "cooked" (c.f. yakitori and yakisoba).
Output (grade 4): Okonomi means "what you like" or "what you want", and yaki means "grilled" or "cooked" (cf. yakitori and yakisoba).