Wiktionary
overlabour
vb. 1 (context transitive English) To cause to labour excessively; to overwork. 2 (context transitive English) To labour upon excessively; to refine unduly.
Usage examples of "overlabour".
At the brief intervals when his bodily weariness overpowered him on his melancholy watch, it was observed by those around him that, even in his short dreaming clumbers, his face remained ever turned in the same direction, towards the head of the couch, as if drawn thither by some irresistible attraction, by some powerful ascendancy, felt even amid the deepest repose of sensation, the heaviest fatigue of the overlaboured mind, and worn, sinking heart.