Hardworking
Part of speech: adjective
Definition: Of a person, taking their work seriously and doing it well and rapidly.
Example sentence: What bothers me about the whole trust-fund thing is that it sort of presumes that everything is handed to you. And if there is one thing about my family that I do identify with, it is that everyone is extremely hardworking.
Tireless
Part of speech: adjective
Definition: Indefatigable, untiring and not yielding to fatigueWithout a tire (wheel covering); tyreless.
Example sentence: My time at Seton Hall has been extremely rewarding. I commend the staff for their tireless and successful efforts in recruiting and elevating the program.