1. (n.) To study by candlelight or a lamp; to study by night.

2. (v. t.) To elaborate, perfect, or compose, by night study or by laborious endeavor.

beat down bring low buckle down couch crush debase defeat depress detrude do double duty downbear elucubrate endeavor get cracking get cutting go all out haul down hit the ball hop to it hotfoot hump hump it hustle indent knuckle down lay to lean on it let down lower lucubrate overpower overwork ply the oar pour it on press down pull down push down reduce scratch shag ass shake a leg shake it up sink slave snap to it spare no effort step on it subdue subjugate sweat take down tear ass thrust down vanquish work hard work late work overtime