The phrase "dangerous grounds" typically refers to a situation or location where there is a high level of risk or potential harm. Other synonyms for this phrase include perilous territory, hazardous terrain, treacherous footing, risky territory, and precarious ground. These terms all convey the same sense of danger and caution required when navigating an uncertain or unstable situation. Whether used in reference to physical locations such as cliffs or rocky slopes, or more metaphorical contexts like political or social situations, these synonyms all emphasize the need for caution and careful judgement when dealing with potential risks.