From Middle English badly, baddely, baddeliche, equivalent to bad + -ly.
Meanings
In a bad manner.
You can eat badly and feel crapola or eat healthily and feel great. The choice is yours... 2005, Cathy Hopkins, The Mates, Dates Guide to Life, Love, and Looking Luscious:
I feel badly about the accident because it was entirely our fault.
Things are going badly for her: she did badly in her exams owing to a badly designed studying schedule.
Don't think badly of me: give me the benefit of the doubt.
Very much; to a great degree.
I want it so badly.
Everything went badly wrong.
Look at these split ends! You badly need a haircut!
In late 1970, Labour assumed the shadow posts, having lost badly (and unforeseenly) in the summer General Election. 2008, Darl Larsen, Monty Python's Flying Circus, page 276:
The task was made trebly difficult, however, by the badly run-down condition in which the railways of Britain had been unavoidably left at the end of the war in 1945, […]. 1958 January 14, 'Borderer', “Ten Years of British Railways”, in Railway Magazine, page 12:
bg зле (in a bad manner) · da dårligt (in a bad manner) · ro rău (in a bad manner) · fur mâl (in a bad manner) · nb dårlig (in a bad manner) · nl slecht (in a bad manner) · es mal (in a bad manner) · ja 悪く (in a bad manner) · fr mauvaisement (in a bad manner) · de schlecht (in a bad manner) · gun vaikue (in a bad manner) · ko 서투르게 (in a bad manner) · zdj nai (in a bad manner) · es malamente (in a bad manner) · hu rosszul (in a bad manner) · tr fena (in a bad manner) · fi pahasti (in a bad manner) · el άσχημα (in a bad manner) · el κακώς (in a bad manner) · sv dåligt (in a bad manner) · oc mau (in a bad manner) · la aliter (in a bad manner) · eu gaizki (in a bad manner) · io male (in a bad manner) · sl slabó (in a bad manner) · eo malbone (in a bad manner) · rm malamain (in a bad manner) · fr mal (in a bad manner) · cs špatně (in a bad manner) · wa må (in a bad manner) · ru нехорошо́ (in a bad manner) · lv slikti (in a bad manner) · ru пло́хо (in a bad manner) · grc κακῶς (in a bad manner) · ang yfele (in a bad manner) · tr acil (in a bad manner) · ca malament (in a bad manner) · it male (in a bad manner) · la male (in a bad manner) · oc mal (in a bad manner) · sc male (in a bad manner) · el κακά (in a bad manner) · ko 나쁘게 (in a bad manner) · gl mal (in a bad manner) · fi huonosti (in a bad manner) · lld melamënter (in a bad manner) · cim brüubel (in a bad manner) · pl źle (in a bad manner) · pt mal (in a bad manner) · ca mal (in a bad manner)