Русский | Английский |
---|---|
обязательный adjective | binding(imposing stipulations or requirements that must be honoured) compulsory(mandatory, see also: mandatory; obligatory) imperative(essential) indispensable(absolutely necessary) mandatory(obligatory, see also: obligatory; compulsory) obligatory(binding, see also: mandatory; compulsory) |
необязательный adjective | expendable(not essential or mandatory) facultative(not obligate; optional) lax [laxer, laxest](not strict; lenient; allowing for deviation) optional(not compulsory) |