roughly

In a rough manner; without kindness, softness, or gentleness.

• They treated the prisoners roughly [...] slashing pitilessly with their whips to drive them as wretched animals before them.

Unevenly or irregularly.

Without precision or exactness; imprecisely but close to in quantity or amount; approximately.

• Satanism can be divided, roughly, into two branches: the Luciferians and the Palladists.
• Of the roughly 400 emerging infectious diseases that have been identified since 1940, more than 60% are zoonotic: ie they came from animals. Throughout history this has been common.