Answer:
Docile: Martin was a rather docile, humble child much loved by his parents.
Torpor: Once she got back from a tiring day at work, Sarah slumped into a state of Torpor from which nothing could rouse her
Heterodox: Keeping heterodox opinions to yourself will help clear doubts amongst your collogues.
Quantify: Mr.Miller could not quantify the sum of money received from his workplace that month, it was simply huge.