studious

But Schumer and his staff have studiously avoided further comment.

But—unfortunately, it suggested to Margot what I have studiously kept from her.

And why, before that, had he been so studiously reticent as to her affairs?

She didn't see clearly how she was to marry him unless he asked her, and he had studiously avoided her since the foreclosure.

He studiously avoided all writing upon the subject, and as far as possible all conversation.

At this station he studiously mastered his drill and prepared himself for the permanent appointment which was promised him.