Adverb

(en adverb)

In a thorough manner; in manner free of defect or deficiency.

He was soundly thrashed by the semi-professional boxer.

* 1899 , , A History of Japanese Literature , page 272

The wedding company, fatigued with their enjoyment of the previous night, slept soundly late into the next morning.

Adverb

(en adverb)

In an efficient or effective manner; with powerful effect.

* {{quote-news

, year=2011 , date=December 19 , author=Kerry Brown , title=Kim Jong-il obituary , work=The Guardian citation , page= , passage=A state ideology, mixing nationalism, and basic Marxist economics, going under the name "Juche", was constructed, and Kim Il-sung effectively silenced, disposed of and cleared away any opposition, isolating the country and exercising an iron grip on the military, the state media and the government and party organs.}}

Essentially, in effect, for all practical purposes.

*{{quote-magazine, date=2012-03

, author=(Henry Petroski) , title=Opening Doors , volume=100, issue=2, page=112-3 , magazine= citation , passage=A doorknob of whatever roundish shape is effectively a continuum of levers, with the axis of the latching mechanism—known as the spindle—being the fulcrum about which the turning takes place.}}