adj. 25B6; adjective
the staff are helpful : OBLIGING, eager to please, kind, accommodating, supportive, cooperative; sympathetic, neighbourly, charitable.
we found your comments helpful : USEFUL, of use, beneficial, valuable, profitable, fruitful, advantageous, worthwhile, constructive; informative, instructive.
a helpful new tool : HANDY, useful, convenient, practical, easy-to-use, functional, serviceable; informal neat, nifty.
unsympathetic, useless, inconvenient.