flawless(without flaws, see also: perfect) adjective [UK: ˈflɔː.ləs] [US: ˈflɒ.ləs]Everything should be prepared flawlessly. = Tutto dovrebbe essere preparato in maniera impeccabile.
seamless(Having no seams) adjective [UK: ˈsiːm.ləs] [US: ˈsiːm.ləs]