Arduous is an adjective that is used to describe that which is very difficult. Laborious. Requiring much energy. Strenuous. Hard to endure.
- He went through years of ‘arduous’ training in order to ensure he was ready for the real thing.
- When your young and full of energy, invest that time in doing tasks that may seem ‘arduous’ so that in your latter years you are wise and experienced.
- Prioritise your time so that you accomplish the ‘arduous’ tasks before you attempt the more menial.