effective

(a) producing or capable of producing an intended result or having a striking effect
- an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation -LewisMumford
- effective teaching methods
- effective steps toward peace
- made an effective entrance
- his complaint proved to be effectual in bringing action
- an efficacious law
effectual, efficacious,
(s) able to accomplish a purpose; functioning effectively
- "people who will do nothing unless they get something out of it for themselves are often highly effective persons..."-G.B.Shaw
- effective personnel
- an efficient secretary
- the efficient cause of the revolution
efficient,
(s) works well as a means or remedy
- an effective reprimand
- a lotion that is effective in cases of prickly heat
(s) exerting force or influence
- the law is effective immediately
- a warranty good for two years
- the law is already in effect (or in force)
in effect, in force, good,
(s) existing in fact; not theoretical; real
- a decline in the effective demand
- confused increased equipment and expenditure with the quantity of effective work done
(s) ready for service
- the fort was held by about 100 effective soldiers

effectual efficacious efficient in effect in force good

ineffective ineffectual uneffective

effectively effectiveness