optional(not compulsory) adjective [UK: ˈɒp.ʃnəl] [US: ˈɑːp.ʃə.nəl]Pain is inevitable. Suffering is optional. = El dolor es inevitable. El sufrimiento es opcional.
opcionalmente adverb
optionally(in an optional manner) adverb [UK: ˈɒp.ʃnə.li] [US: ˈɒp.ʃnə.li]
subtítulos opcionales noun {m-Pl}
closed caption(text displayed on a screen with suitable equipment) noun