It could be quickly or maybe rapidly. But it just depends which one you like.
No, "fastly" is not correct. The correct form is "fast" when used as an adverb to describe the rate or speed of something. For example, "She runs fast."
Even though fastly is not a real word, there are two syllables in "fastly". "Fast-ly"However, quickly is a better adverb just to let you know. It also has two syllables. "Quick-ly"
by swimming fastly
fastly
fastly.
no
big words to describe excelence
move your moo fastly back and fastly forward then let it roll
slowly
fastly
Yes, but not for fast referring to speed.The adverb fastly is an alternate form of the adverb "fast" meaning securely or tightly (tied or bound).
No fastly is not a word. Fast is an adverb so you can say: He ran fast.