Wiktionary
laboursome
a. 1 (context obsolete English) hard-working. 2 (context now rare English) Requiring labour, laborious; difficult, elaborate, involved.
Usage examples of "laboursome".
Duncan, who had set his heart on making a scholar of him, and would never, indeed, had Gaelic been amongst his studies, have been won by the most laboursome petition.
And beeing come to the fift mount, they finde it speculable, lyke a mirrour wherein they see theyr representations, and in that they take great delyght, and with a feruent desire they passe on their laboursome course.