Another word for earnestly

Even when I studied most earnestly it seemed more like play than work.

"Desire earnestly the greater gifts," he wrote to the Corinthians.

They applauded all his tricks and at the end of the performance begged him earnestly not to go away again and leave them.

He adopted the idea of introducing the Old Scandinavian element into art, and even into life, still more earnestly than the older poet.

If you would avoid uncleanness, and all the sins, work earnestly, though it be at cleaning a stable.