taskmaster

English

Etymology

task +‎ master

Noun

taskmaster (plural taskmasters)

1. Someone who supervises workers, especially one who imposes hard or burdensome work.
   • 1611, King James Version, Exodus 3:7:

     And the Lord said, I have surely seen the affliction of my people which are in Egypt, and have heard their cry by reason of their taskmasters; for I know their sorrows

2. (figuratively) A source of hard work or responsibility.