Astir and In force

Astir adjective - Marked by much life, movement, or activity.

In force and astir are semantically related In some cases you can use "In force" instead an adjective "Astir".

In force adjective - Exerting force or influence.

Astir and in force are semantically related in active topic. Sometimes you can use "Astir" instead an adjective phrase "In force", if it concerns topics such as having movement.