effectual Copy link Outline 1. effĭcax, ācis (that obtains its purpose)2. vălens, ntis (having force)3. vălĭdus (= valens)4. praesens, ntis (exercising immediate influence)5. pŏtens, ntis • effectual: 1. effĭcax, ācis (that obtains its purpose): e. prayers, e. preces, Liv.: a plant which is very e. as an antidote against poisons, herba efficacissima contra venena, Plin. 2. vălens, ntis (having force): e. as a remedy against cancer, v. adversus cancerem, Cels.: an e. remedy, v. remedium, Cels. When the adj. follows to be, the verb valeo may be used: why are the poisons less e.? cur minus valent venena? Hor.: Cic.: v. influential. 3. vălĭdus (= valens): an e. medicine, v. medicamen, Ov.: Tac. 4. praesens, ntis (exercising immediate influence): an e. remedy, pr. remedium. Col.: Plin. 5. pŏtens, ntis: v. powerful. Phr.: it is an e. remedy for wounds, vulneribus optime medetur (facit), Plin.: to adopt more e. measures for one's security, acrioribus saluti suae remediis subvenire, Cic.: to take e. precautions for oneself, satis sibi cavere (praecavere), Cic.