usefulThese useful gadgets should find a home in every kitchen.
helpfulThey gave us some really helpful advice.
invaluableThe Internet is an invaluable resource for teachers.
constructiveIt was a very constructive discussion.
worthwhileIt's a difficult course but it's very worthwhile.
informativeIt's an interesting and highly informative book.
instructiveWe had a very instructive discussion.
functionalThe furniture is functional, not fashionable.
utilitarianOn the shelves there is a mixture of utilitarian and decorative objects.
handyThat's a handy little gadget.
efficientThere has to be a more efficient way to handle the problem.
workingThe working hypothesis is that this is not cross-contamination.