heavily

In a heavy manner.

“He clomped heavily up the stairs in his boots.”

With a great weight.

“heavily burdened”

To a considerable degree, to a great extent.

“He drank heavily.”

In a manner designed for heavy duty.

“heavily armed soldiers;   heavily armoured tanks;   heavily reinforced walls”

So as to be thick or heavy.

“heavily built young men;   his heavily muscled arms”

In a laboured manner.

“he breathed heavily”