| |||
dispensable; escapable; facultative; optional; permissive; unrequired; not obligatory; unobliging (про людину); unreliable | |||
elective | |||
free | |||
non-compulsory | |||
non-obligatory |
необов'язковий : 26 phrases in 11 subjects |
American usage, not spelling | 1 |
Aviation | 1 |
Computers | 2 |
Diplomacy | 3 |
European Union | 1 |
Finances | 6 |
Human rights activism | 1 |
Information technology | 8 |
Law | 1 |
Microsoft | 1 |
Military | 1 |