Can we tighten our belts, knuckle down and use that knowledge that our forefathers and mothers gave us?
“Being new in town, it was really important to focus and knuckle down,” she said of her decision to focus on acting.
“knuckle down,” according to our recollections, was the laying the knuckle on the ground for a shot.
Meanwhile, put aside all that idea and knuckle down and help.
If you are cowardly, she will be bold; but if you are bold and resolute, she will knuckle down.
Well, my good times are over, and I'll have to knuckle down to work now.
I never did knuckle down ter thet sort, an' I 'm too old now ter begin.
I get wore out lots of times and knuckle down, but Dr. Hugh won't.
I expect they'll both be fallin' over theirselves to knuckle down to each other from now on!
But the commander refused to knuckle down to any show of arrogance.
mid-14c., knokel "finger joint; any joint of the body, especially a knobby one; morbid lump or swelling;" common Germanic (cf. Middle Low German knökel, Middle Dutch cnockel, German knöchel), literally "little bone," a diminutive of Proto-Germanic root *knuck- "bone" (cf. German Knochen "bone).
As a verb from 1740, originally in the game of marbles. To knuckle down "apply oneself earnestly" is 1864 in American English, extended from marbles (putting a knuckle on the ground in assuming the hand position preliminary to shooting); to knuckle under "submit, give in" is first recorded 1740, supposedly from the former more general sense of "knuckle" and here meaning "knee," hence "to kneel." The face-busting knuckle-duster is from 1858 (a duster was a type of protective coat worn by workmen).
knuckle knuck·le (nŭk'əl)
The prominence of the dorsal aspect of a joint of a finger, especially of one of the joints that connect the fingers to the hand.
A rounded protuberance formed by the bones in a joint.
A kink or loop of intestine, as in a hernia.
To work hard and seriously; stop loafing; buckle down
[1866+; fr the act of putting one's knuckles down to the taw or marble preparing for a careful shot in the game of marbles, a use dating fr the mid-18th century]