effective adj.

1 producing the result you want

VERBS be, look, prove, seem | make sth | find sth We find advertising on the radio very effective.

ADV. brilliantly, especially, extremely, highly, particularly, really, remarkably, very a highly effective technique | completely, fully, perfectly | increasingly | fairly, moderately, partially, pretty, quite, rather, reasonably | enough This method is effective enough with greenfly. | not sufficiently | immediately | potentially | devastatingly, powerfully, surprisingly Sneezes are devastatingly effective at spreading infection. | politically What makes a TV programme politically effective?

PREP. at effective at keeping out the wind | in effective in helping people to stop smoking

2 of laws/rules

VERBS be | become | remain

ADV. fully | partially | directly, immediately directly effective treaty provisions | legally