He answer'd not one Word, but look'd very grave and sad: I ask'd him what was the matter with him?

Well, if you want to look professional, serious and more conservative, a blue dress, white shirt and not-too-high shoes would be the best choice.

He spoke in a voice that was grave and almost bass.

Each graduate behaved with gravity at it.

She looks both Indian and Western, and is often put into sexy, serious roles.