knuckle down to something

knuckle down (to something)

in. to get busy doing something. Please knuckle down to your studies.

Name	Pronounced	Usage
Alphaios	-	Biblical Greek
Felice	[fə'li:s]
Casey	['keisi]
Ahmed	-	Turkish, Bosnian, Arabic, Urdu, Pashto
Harlan	HAHR-lən	English
Laws	[lɔ:z]