effect; effectiveness; efficacy; effects (e.g. sound effects, visual effects, special effects)
valid; effective; yuko (judo)
invalid; void; ineffective; unavailable
effect; efficacy; validity; potency
effect; effectiveness; efficacy; virtue; benefit
prescription; statute of limitations; lapsing with time (e.g. of an obligation); no longer standing (e.g. of a promise); ageing; aging
use; utility; effect; benefit
to succeed; to bear fruit
to be beneficial to; to be efficacious
statement of the efficacy of a medicine
no medical treatment having proved effective
to be beneficial to; to be efficacious
binding legal effectiveness as to third parties
aftereffect; after effect
collateral estoppel; issue preclusion