optionally

Cellular immunotherapy involves extracting immune cells from a patient's tumor, optionally engineering them to enhance their natural abilities to combat cancer and reintroducing them to the body after they've been expanded in culture.

Gezellig: Throw around your shoulders in a devil-may-care way and sing hearty songs around a bonfire with your besties, or optionally, on a sleigh.

And I think it would be good for Twitter and most social networks if anybody wanted to optionally verify their identity.

The technology underpins the online exchanges on apps including WhatsApp, Signal, Telegram and - optionally - on Facebook messenger.

These accounts can share apps on the same device using Meta’s App Sharing feature, and you can optionally link them to a Facebook and Instagram account to enable some social features.