Costlessly
Wiktionary, Creative Commons Attribution/Share-Alike License
adverb.
without
cost
Word Usage
"If goods were costlessly tradable and prices were flexible, then the two prices would have to be equal and the real exchange rate would always be one -- one candy bar for one candy bar."
Antonyms
Words with the opposite meaning
costly
Etymologically Related
cost
costless
Synonym
Words with the same meaning
freely