ponderously
🇺🇸
/ˈpɑːndərəsli/
🇬🇧
/ˈpɒndərəsli/
Moving or acting very slowly and with great effort, often in a dull or serious manner.
He ponderously deliberated over the complex problem, taking his time to weigh all the options.
Moving with great weight and slowness.
The large ship moved ponderously through the water, its progress steady but unhurried.