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.
I wish to preach , not the doctrine of ignoble ease , but the doctrine of the strenuous life , the life of toil and effort , of labor and strife ; to preach that highest form of success which comes , not to the man who desires mere easy peace , but to the man who does not shrink from danger , from hardship , or from bitter toil , and who out of ...