mostly

Mainly or chiefly; for the most part; usually, generally, on the whole.

They're mostly good people, although they have made a few mistakes.

Mostly, the microbiome is beneficial. It helps with digestion and enables people to extract a lot more calories from their food than would otherwise be possible. Research over the past few years, however, has implicated it in diseases from atherosclerosis to asthma to autism.

To the greatest extent; most.

She was to be their chosen visitor, she was to be for weeks under the same roof with the person whose society she mostly prized [...]!