Gradatim is a Latin word that means "step by step" or "gradually". When you are explaining something or doing a task slowly, you can use many synonyms for gradatim such as progressively, systematically, gradually, steadily, step-by-step, bit-by-bit, inch-by-inch, and day-by-day. If you're talking about increasing something gradually, you can use terms like incrementally, gradually, bit-by-bit, step-by-step, or layer-by-layer. When you want to use a metaphor to describe this idea, you can compare it to setting a foundation brick-by-brick, or climbing a ladder rung-by-rung. So, these are some of the synonyms for the word "gradatim" that will help you communicate your ideas more effectively.