Adjective
1. rare ::
seldsum
2. uncommon ::
ûngewoan
3. unusual ::
unusual
4. exceptional ::
útsûnderlik
7. unaccustomed ::
net wend
8. unwonted ::
unwonted
9. isolated ::
ôfsûnderje
10. scarce ::
scarce
12. sporadic ::
sporadysk
13. irregular ::
irregular
14. intermittent ::
intermittent
15. seldom ::
selden
16. once in a blue moon ::
ien kear yn in blauwe moanne