AM and PM are associated with 12-hour timekeeping, as opposed to the international 24-hour clock. The 12-hour system grew up mainly in Northern Europe, and spread globally from there via the British Empire.
The adjective STRENUOUS has 2 senses: 1. characterized by or performed with much energy or force. 2. taxing to the utmost; testing powers of endurance. Familiarity information: STRENUOUS used as an adjective is rare.
Strenuous activity should be avoided for about 2 weeks after the procedure. The procedure itself is painless. Most people develop some discomfort during the first week after the procedure. This is usually relatively mild and passes quickly. Patients are given a detailed set of instructions.