thusly

Etymology
From, dating from the 19th century, seemingly coined by educated writers to make fun of uneducated persons trying to sound genteel, with a false inference that thus is not an adverb.

Adverb

 * 1)  thus (in this way).
 * 2) * 1995 December, John P. Wiley Jr, quoting Edward R. Harrison, Smithsonian Magazine:
 * The history of the Universe has been summed up thusly: "Hydrogen is a light, odorless gas, which, given enough time, turns into people."
 * 1)  thus (therefore)
 * 1) * 1995 December, John P. Wiley Jr, quoting Edward R. Harrison, Smithsonian Magazine:
 * The history of the Universe has been summed up thusly: "Hydrogen is a light, odorless gas, which, given enough time, turns into people."
 * 1)  thus (therefore)
 * 1)  thus (therefore)
 * 1)  thus (therefore)

Usage notes
Although thusly has diffused into popular usage, it may be regarded as incorrect by some; instead, other equivalent expressions (such as thus or this way) can be used. It originated in the Eastern U.S., and it is still more common in American than British English; it is "often used for amusement or to make an ironic point."