She is blither than her sister.

She tends to blither on about her day without really saying anything important.

He was blithering on about his new invention.

He is blithering about his new project.

He was spouting blithering nonsense all day.

She blithers on and on about her problems.

He blithered on about his new car.

The blitherings of the children could be heard from the next room.

He was blitheringly unaware of the consequences of his actions.