In the sentence 'The scientist's hypothesis was so perspicacious that it predicted results three experiments ahead,' what does 'perspicacious' most likely mean?

Based on context in 'The politician's grandiloquent speech failed to address any real issues,' what does 'grandiloquent' suggest?

In 'The artist's work was so ephemeral that visitors had to see it within hours of creation,' what does 'ephemeral' mean?

What does the phrase 'burning the midnight oil' mean in 'Sarah was burning the midnight oil to finish her research project'?

In 'The coach's vitriolic comments after the loss demoralized the entire team,' what does 'vitriolic' most likely mean?

Based on 'The new software's interface was so intuitive that even beginners mastered it quickly,' what does 'intuitive' suggest?

What does 'spill the beans' mean in 'Marcus accidentally spilled the beans about the surprise party'?

In 'The defendant's mendacious testimony contradicted all the evidence,' what does 'mendacious' mean?

Based on 'The chef's culinary skills were so prodigious that restaurants competed to hire her,' what does 'prodigious' suggest?

What does 'break the ice' mean in 'The teacher used a funny story to break the ice on the first day'?

In 'The student's surreptitious use of notes during the exam was quickly noticed,' what does 'surreptitious' mean?

Based on 'The musician's performance was so mellifluous that the audience sat in complete silence,' what does 'mellifluous' suggest?

What does 'hit the nail on the head' mean in 'Dr. Johnson hit the nail on the head with her diagnosis'?

In 'The author's writing style was so verbose that readers lost interest quickly,' what does 'verbose' mean?

Based on 'The company's decision to expand was quite judicious given the market conditions,' what does 'judicious' suggest?

What does 'piece of cake' mean in 'The math test was a piece of cake for Elena'?

In 'The politician's speech was full of platitudes that offered no real solutions,' what does 'platitudes' mean?

Based on 'The scientist's theory was so esoteric that only a few experts understood it,' what does 'esoteric' suggest?

What does 'barking up the wrong tree' mean in 'The detective was barking up the wrong tree with that suspect'?

In 'The student's perfunctory effort on the project resulted in a poor grade,' what does 'perfunctory' mean?

In 'The archaeologist's meticulous excavation revealed artifacts that had been obfuscated by centuries of sediment,' what does 'obfuscated' most likely mean?

Based on 'The economist's prognostication about market trends proved remarkably accurate six months later,' what does 'prognostication' suggest?

In 'The surgeon's dexterous movements during the delicate operation impressed all the medical students,' what does 'dexterous' mean?

What does 'throw in the towel' mean in 'After three failed experiments, the research team decided to throw in the towel on that hypothesis'?

What does 'cut to the chase' mean in 'The CEO decided to cut to the chase and announce the layoffs immediately'?

In 'The philosopher's abstruse theories required years of study to comprehend fully,' what does 'abstruse' mean?

What does 'jump the gun' mean in 'The pharmaceutical company jumped the gun by announcing results before peer review was complete'?