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tough nut to crack
| Main Entry: | |
| Part of Speech: | noun |
| Definition: | mystery |
| Synonyms: | Gordian knot, bewilderment, cliffhanger, conundrum, crux, cryptogram, grabber, knot*, mind-boggler, mind-twister, mystification, parable, perplexity, problem, puzzle, puzzlement, puzzler, question, question mark, riddle, secret, sixty-four dollar question, sphinx, sticker, stickler, stumper, teaser, tough nut to crack, twister, why* |
* = informal/non-formal usage
| Main Entry: | obdurate |
| Part of Speech: | adjective |
| Definition: | pigheaded, stubborn |
| Synonyms: | adamant, bullhead, callous, cold fish, dogged, firm, fixed, hanging tough, hard, hard-boiled, hard-hearted, hard-nosed, harsh, heartless, immovable, implacable, indurate, inexorable, inflexible, iron, mean, mulish, obstinate, perverse, relentless, rigid, set in stone, stiff-necked, thick-skinned, tough, tough nut to crack, unbending, uncompassionate, uncompromising, uncooperative, unemotional, unfeeling, unimpressible, unrelenting, unshakable, unsympathetic, unyielding |
| Antonyms: | amenable, gentle, submissive, susceptible, yielding |
| Main Entry: | riddle |
| Part of Speech: | noun |
| Definition: | brain-teaser |
| Synonyms: | bewilderment, brain-twister, charade, closed book, complexity, complication, confusion, conundrum, cryptogram, dilemma, distraction, doubt, embarrassment, enigma, entanglement, intricacy, knotty question, labyrinth, maze, mind-boggler, mystery, mystification, perplexity, plight, poser, predicament, problem, puzzle, puzzlement, quandary, question, rebus, sixty-four dollar question, stickler, strait, stumper, teaser, tough nut to crack, tough proposition, twister |
| Main Entry: | rigid |
| Part of Speech: | adjective |
| Definition: | stiff, strict, severe |
| Synonyms: | adamant, adamantine, austere, bullheaded, changeless, chiseled, dead set, definite, determined, exact, firm, fixed, hard, hard-line, harsh, incompliant, inelastic, inexorable, inflexible, intransigent, invariable, locked in, obdurate, rigorous, set, set in stone, single-minded, solid, static, stern, strait-laced, stringent, tough nut to crack, unalterable, unbending, unbreakable, unchanging, uncompromising, undeviating, unmoving, unpermissive, unrelenting, unyielding |
| Antonyms: | bending, flexible, lenient, limber, pliable, pliant, soft, yielding |
| Main Entry: | perplexity |
| Part of Speech: | noun |
| Definition: | mystery |
| Synonyms: | abstruseness, brainteaser, braintwister, charade, chiller, cliffhanger, closed book, conundrum, crux, cryptogram, difficulty, enigma, grabber, inscrutability, inscrutableness, mindboggler, mystification, occult, oracle, poser, problem, puzzle, puzzlement, puzzler, question, rebus, riddle, rune, secrecy, sixty-four-thousand-dollar question, sphinx, stickler, stumper, subtlety, teaser, thriller, tough nut to crack, twister, whodunit, why* |
* = informal/non-formal usage
| Main Entry: | puzzler |
| Part of Speech: | noun |
| Definition: | mystery |
| Synonyms: | abstruseness, brainteaser, braintwister, charade, chiller, cliffhanger, closed book, conundrum, crux, cryptogram, difficulty, enigma, grabber, inscrutability, inscrutableness, mindboggler, mystification, occult, oracle, perplexity, poser, problem, puzzle, puzzlement, question, rebus, riddle, rune, secrecy, sixty-four-thousand-dollar question, sphinx, stickler, stumper, subtlety, teaser, thriller, tough nut to crack, twister, whodunit, why* |
* = informal/non-formal usage
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2013 by the Philip Lief Group.
Cite This Source
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2013 by the Philip Lief Group.
Cite This Source
Copyright © 2013 Dictionary.com, LLC. All rights reserved.
