exacting adj.费力的 严格的(demanding rigorous)
Jane is very exacting in her work
ascetic adj,苦行的(austere rigorous strict
grim adj.冷酷的(cruel merciless)
Each day, the chance for peace became more grim
relentless adj,无情的(merciless ruthless)
The relentless bully beat Jimmy up
ruthless adj.无情的 冷酷的(merciless pitiless)
The ruthless tyrant caused the deaths of millions of people
rigid adj.严格的 僵化的(strict fixed)
Their rigid notion of true womanhood had been restricting women's life for centuries
stern adj.严格的 僵化的(harsh hard strict)
The museum guard gave us a stern warning not to touch the paintings
stringent adj.严格的 迫切的(strict rigid)
Our company has a stringent policy against smoking
scrupulous adj.严谨的 讲究的(prudent meticulous)
The secretary is scrupulous about her dress
drastic adj.严厉的(severe)
The  principal felt that the cheater's punishment should be drastic.
The emergency called for drastic measure
harsh adj.严厉的(severe)
The judge gave the criminal a harsh sentence
rigor n.严格 严厉(rigidity hardship)
Those homeless children had to face the rigors of life by themselves
rigorous adj.严厉的 严峻的(strict rigid)
The trainings soldiers received were rigorous
serious adj.严肃的
Serious arts are becoming more and more popular among consideration
severe adj.严重的 严肃的(grave grievous)
austerity n.严峻的
War was followed by many years of austerity
ordeal n.严酷的考验(difficult experience trial)