Language/Volapuk/Grammar/imperative

The imperative, used in requesting or commanding, is expressed by the endings -ös and -öd:

• (Singular) Kömolös ko flen! ‘(Please) come with a friend!’ (expressing a wish)
• (Plural) Kömolsöd ko flen! ‘(You must) come with a friend!’ (expressing a command)

Source: http://www.xn--volapk-7ya.com/quick-look-at-volapuk.html