Strong's H4522 · Hebrew

mac

mas

or mic {mees}; from 4549; properly, a burden (as causing to faint), i.e. a tax in the form of forced labor

Scholarly Lexicons

Brown-Driver-Briggs (BDB)

 H4522 מַס body of forced labourers , task-workers , labour-band or gang , also (late) forced service , task-work , serfdom  

Brown-Driver-Briggs Hebrew Lexicon (BDB), 1906 — public domain