坚持
 irreconcilable 不能妥协的
 indomitable 不屈不挠的
 sturdy 不屈地 the sturdy bridge withstood the shaking of the earthquake
 obstinate 固执的
 bigoted 固执己见的 the bigoted manager refused to hire minority workers
 persistent 坚持不懈的 i told the persistent salesman to leave me alone
 inflexiable 坚定的
 steadfast 坚决、坚定、不变的
 unshaken 坚决的、不动摇的
 durable 耐久的、耐用的 this very durable watch is both waterproof and shatterproof
 tough 强硬的、坚硬的、粗暴的 that cop is really tough, she never let any burger go away out of her hand
 headstrong 顽固的
 stuborn 顽固的
 tenacious 抓住不放的、顽强的 the tenacious applicant soon get the job
 resolute 坚决的
 hardheaded 顽固的
 stoically 坚韧的
 fortitude 坚韧、刚毅 the soilders were given a medal for their fortitude during the battle
 resist 坚持 he could resist no longer
 remain 保持、逗留 he reamin at the hime for the whole day waiting for his lovely girlfriend to come
 perserve 坚持、不屈不挠 you will need to perserve if you want business to succeed
 perserverance 坚定不移
 maintain 坚持 no matter how hard we tried to persuade him, he maintained his wrong idea
 insist 主张、坚持说 she insisted that she never wanted to play hero in the battle