ETYM French actif, Latin activus, from agere to act.
1. Characterized by energetic activity.
2. Characterized by energetic bodily activity; SYN. physical.
3. (Grammar) Expressing action rather than a state of being; used of verbs (e.g. 'to run') and participial adjectives (e.g. 'running' in 'running water'); SYN. dynamic.
4. (Military) Engaged in or ready for military or naval operations; SYN. combat-ready, fighting.
5. (Of e.g. volcanos) Being in a state of action or potential action.
6. (Pathology) Tending to become more severe or wider in scope.
7. Being in physical motion; SYN. on the move.
8. (Astronomy; of the sun) Characterized by a high level activity in sunspots and flares and radio emissions.
9. Disposed to take action or effectuate change.
10. Exerting influence or producing an effect.
11. Engaged in full-time work; (military).
12. In operation.
13. Taking part in an activity; SYN. participating. + prikaži više

ETYM Latin effectivus: cf. French effectif.
1. Able to accomplish a purpose; functioning effectively; SYN. efficient.
2. Producing or capable of producing an intended result or having a striking effect; SYN. effectual, efficacious.
3. Working well as a means or remedy.
4. Existing in fact; not theoretical; real.
5. Exerting force or influence; SYN. good, in effect, in force.
6. (Military) Equipped and ready for service. + prikaži više

1. Exerting or capable of exerting strong physiological or chemical effects.
2. Sufficient to produce a result.

ETYM Latin eficax, -acis, from efficere. Related to Effect.
Marked by qualities giving the power to produce an intended effect.

In an effectual manner.

In an effective manner; SYN. effectively.