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| vabatahtlik | |||
| valikuline (Pertaining to a component, parameter and so on that is not required or automatic) | |||
| English thesaurus | |||
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| opsh | |||
| opt. | |||
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| o/p | |||
| O | |||
|
optional : 20 phrases in 10 subjects |
| Agriculture | 1 |
| Business | 1 |
| Education | 4 |
| Finances | 1 |
| General | 5 |
| Health care | 1 |
| Human rights activism | 2 |
| Insurance | 1 |
| Microsoft | 3 |
| Misused | 1 |