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Common words appear frequently in written and spoken language across many genres from radio to academic journals.
Informal words should be reserved for casual, colloquial communication.
More words related to knuckles down
verb. work hard
verb. work very hard
- occupy oneself with
- pitch in
- plunge into
- put one's hand to the plow
- put one's nose to the grindstone
verb. think about closely
- be engrossed in
- bring to bear
- brood over
- consider closely
- crack one's brains
- direct attention
- fix attention
- focus attention
- get on the beam
- give attention
verb. be employed; exert oneself
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.Cite This Source