The same way you asked how to spell it :)
The likely word is the adverb carelessly (recklessly, without concern or regard).
The comparative form of "carelessly" is "more carelessly."
Carelessly has 2 suffixes
Carelessly is an adverb.
The adverb being referenced may be: FEARLESSLY - boldly, done without fear FRIVOLOUSLY - done in a frivolous or indulgent manner, or carelessly
"Bob carelessly stepped on the loose rock and twisted his ankle." "Many people act carelessly when they are in familiar surroundings."
Uncoordinated. Cumbersome. Bunglesome
The opposite of carefully is carelessly.Both carefully and carelessly are adverbs.
The word carelessly (uncautiously) is an adverb. The word careless is an adjective.
noun: street
The word 'carelessly' is an adverb, a word that modifies a verb or an adjective. Examples:Modifying a verb: She carelessly stirred the pancake batter, splashing it all over the counter.Modifying an adjective: His carelessly spoken words hurt his chance for being hired.
The gerund is "Driving" and the gerund phrase is "Driving carelessly".