Sentence:  Like many others , he had to work hard , <WSD>long</WSD> hours in a struggling family business which , though it was allied to art of a kind - the design and production of engraved seals - bore no relation to the painting of pictures . 
Meaning of the word marked with <WSD> tags:  primarily temporal sense; being or indicating a relatively great or greater than average duration or passage of time or a duration as specified