1. 形容詞
   更僵硬的, 更僵直的
   更硬的, 更挺的
   更不易移動的, 更不靈活的
   更拘謹的, 更生硬的
   更不自然的
   更嚴厲的
   更困難的, 更艱難的
   更費勁的
   更剛強的, 更倔強的
   更強烈的, 更猛烈的
   

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   同義字詞
   inflexible,rigid,stiffened,unyielding
   bitter,brutal,burdensome,cruel,excruciating,grievous,grim,hard,harsh,heavy,inhuman,murderous,onerous,oppressive,rough,rugged,searing,severe,tough,trying
   devilish,excessive,exorbitant,extravagant,extreme,fancy,immoderate,inordinate,insane,intolerable,lavish,overdue,overextravagant,overmuch,overweening,plethoric,steep,towering,unconscionable,undue,unmerciful
   compact,firm,hard,rigid,solid,unyielding
   awkward,clumsy,gauche,graceless,inelegant,rough-hewn,rustic,rustical,stilted,uncomfortable,uneasy,ungraceful,wooden
   arduous,Augean,backbreaking,challenging,demanding,difficult,effortful,exacting,formidable,grueling,gruelling,hard,heavy,herculean,killer,laborious,moiling,murderous,rigorous,rough,rugged,severe,strenuous,sweaty,tall,testing,toilsome,tough,uphill
   ceremonious,correct,decorous,formal,proper,punctilious,starchy,stilted
   

例句

1. It's a stiffer drink you've had before.
2. The big toe is usually stiffer than before.
3. The front anti-roll bar was slightly stiffer .
4. The stems become stiffer and less brittle with time.
5. The DCR has been improved with stiffer material sheets.
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