I've heard a line in a song contained "...I slept peaceful on your shoulder...". Is this correct from a native speaker point of view? Is peaceful here an adverb without a -ly form, or does it relate more to object "I" (like "I was peaceful and I slept...")
My situation is using "loud" as adverb with "dispute" verb. Is it appropriate to say "They dispute too loud"?
Thanks in advance,