The Collaborative International Dictionary of English v.0.48:
hardworking \hard"work`ing\ adj. 1. habitually working diligently and for long hours. Syn: industrious, tireless, untiring. [WordNet 1.5]WordNet (r) 3.0 (2006):
hardworking adj 1: characterized by hard work and perseverance [syn: hardworking, industrious, tireless, untiring]