The crossword solution for the term 'labour hard' is 'TOIL'. TOIL is a verb that means to work hard and persistently, often with little reward or recognition. It is usually used in reference to physical labor, such as manual labor or agricultural work. Toiling can also refer to mental labor, such as studying or researching. Labouring hard is an important part of many people's lives, and it is often necessary to achieve success.