brisk

(verb) become brisk. Synonyms: brisk up, brisken. Example: "Business brisked up."

(adj) quick and energetic. Synonyms: alert, lively, merry, rattling, snappy, spanking, zippy. Examples: "A brisk walk in the park." "A lively gait." "A merry chase." "Traveling at a rattling rate." "A snappy pace." "A spanking breeze."

(adj) imparting vitality and energy. Synonyms: bracing, fresh, refreshing, refreshful, tonic. Example: "The bracing mountain air."

(adj) very active. Example: "Doing a brisk business."