Something done as an action or a movement.
The lexical aspect (aktionsart) of verbs or predicates that change over time and have no natural end point.
Something done for pleasure or entertainment, especially one involving movement or an excursion.
The state or quality of being active; activeness.
The number of radioactive decays per unit time. Unit for it: becquerel or curie
The propery of substances to react with other substances
A sincere attempt; a determined or assiduous effort towards a specific goal; assiduous or persistent activity.
To work with purpose.
To attempt through application of effort (to do something); to try strenuously.