Acute
Severe
Ceaseless
Lasting forever
Empirical
True and able to be verified by observation
Finitude
Something that has limits
Idyll
A peaceful and picturesque scene
Ineluctable
Something that is inescapable
Ledger
A book used to keep records
Pluperfect
Being better than perfect
Strive
Aiming to do better
Sate
To satisfy something totally