Knuckle under: to cease resistance (as to another's arguments, demands, or control). Find more ways to say knuckle under, along with related words, antonyms and example phrases at Thesaurus.com, the world's most trusted free thesaurus. knuckle down definition: 1. to start working or studying hard: 2. to start working or studying hard: 3. to start working…. What is the meaning of knuckle under? Football: SHOLA'S PROMISE. Definition of knuckle under in the Definitions.net dictionary. The game of marbles can also claim the origin of another widely used term - for keeps. knuckle down phrase. knuckle under - WordReference English dictionary, questions, discussion and forums. Define knuckle under. An idiom is a word, group of words or phrase that has a figurative meaning that is not easily deduced from its literal meaning. n. 1. a. Find another word for knuckle under. Synonyms for knuckle under include surrender, capitulate, submit, succumb, yield, accede, concede, fall, relent and acquiesce. ... "Every single player here wants to improve, with no exceptions, and I believe we will all knuckle down and do that under the new manager." The prominence of the dorsal aspect of a joint of a finger, especially of one of the joints connecting the fingers to the hand. b. (intransitive, idiomatic) To yield or cooperate when pressured or forced to do so. We will look at the difference between knuckle under and knuckle down, where the terms came from and some examples of their use in sentences. What does knuckle down expression mean? Information and translations of knuckle under in the most comprehensive dictionary definitions resource on the web. Knuckle under and knuckle down are two idioms that are similar but have very different meanings. What are synonyms for knuckle under? What is the definition of knuckle under? Find more similar words at wordhippo.com! The latter has migrated to the more commonplace knuckle under. Meaning of knuckle under. Learn more. Definition of knuckle down in the Idioms Dictionary. knuckle under synonyms, knuckle under pronunciation, knuckle under translation, English dictionary definition of knuckle under. What does knuckle-under mean? (verb) Definitions by the largest Idiom Dictionary. Another word for knuckle under. How do you use knuckle under in a sentence? Knuckle under definition: If you knuckle under , you do what someone else tells you to do or what a situation... | Meaning, pronunciation, translations and examples All Free. 18 synonyms of knuckle under from the Merriam-Webster Thesaurus, plus 13 related words, definitions, and antonyms. By 1864, Webster's Dictionary defined the knuckle down with the meaning we now use, that is,: "To apply oneself earnestly or vigorously." knuckle under definition in the English Cobuild dictionary for learners, knuckle under meaning explained, see also 'knuckle down',knuckle down',knuckleduster', English vocabulary