Carrying the cups

Before the community lunch began, Mara darted between the tables, setting down napkins and spoons. When the kitchen hatch opened, she lifted a tray of filled cups. Her pace became measured as she crossed the crowded hall, watching the liquid tremble near each rim. By the time she reached the final table, every cup was still full.

Select one word from the passage which describes Mara's pace while she carries the filled cups.