buckle down buckled • buckle finisher · · · Info · Definitions · Synonyms · Characters · · buckle down · · Text Common · · Latin · · Scripts 11 · · Length 3 · · Syllables Definitions · · · (verb) work very hard, like a slave. Synonyms: slave, break one's back, buckle down, knuckle down. · · Verb Definition 1 Synonyms · · · slave · · Synonym 1 break one's back · · Synonym 2 knuckle down · · Synonym 3 Characters · · space U+0020 b latin small letter b U+0062 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 k latin small letter k U+006B l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F u latin small letter u U+0075 w latin small letter w U+0077