hard，solid，stiffness，rigidity，adamancy ；

[例句] 针对他们各人不同的需要挑选柔软、软硬适中或者坚硬的床垫。 Choose a soft, medium or firm mattress to suit their individual needs.

[例句] 恐龙峡谷中的化石都嵌在坚硬的砂岩中。 The fossils at Dinosaur Cove are embedded in hard sandstones.

solid，substantial，strong，staunch，massiness ；

[例句] 她像个男人似的握了手，坚实而又有力。 She shook hands in a mannish way, her grip dry and firm.

[例句] 我决定在这个坚实的基础之上继续努力。 I am determined to build on this solid foundation.

firm，solid，sturdy，strong，firmly ；

[例句] 银行往往建得看上去很坚固，好让顾客放心。 Banks are built to look solid to reassure their customers.

[例句] 这款相机既坚固耐用，又有超凡的光学性能和快门速度。 The camera combines rugged reliability with unequalled optical performance and speed.

strong，firm，staunch，（加强） strengthen，adamancy ；

[例句] 生活总是让我们遍体鳞伤，但到后来，那些受伤的地方会变得更坚强。 The world breaks everyone, and afterward, many are stronger at the broken places.

[例句] 当你从内心深处找到一种可以忍受一切痛苦的坚强力量时，你的成长历程就会出现飞跃。 The turning point in the process of growing up is when you discover the core of strength within you that survives all hurt.

persist in，persevere in，insist on，persistence；

[例句] 他坚持让我们在亚特兰大市外不远的一家小餐馆歇歇脚。 He insisted we stop at a small restaurant just outside of Atlanta.

[例句] 虽然朋友们明确反对，她还是坚持己见。 She persevered in her idea despite obvious objections raised by friends.

firm，staunch，steadfast，（使坚定） strengthen，firmly ；

[例句] 这使我更加坚定了不做修女的决心。 It has confirmed me in my decision not to become a nun.

[例句] 他个性坚定，但绝不是什么狂热分子。 He was forceful, but by no means a zealot.

firm，resolute，determined，resolved，be dead set on ；

[例句] “我会找催眠师试试，”我突然坚决地说。 "I think I'll try a hypnotist," I said with sudden resolution.

[例句] 萨拉态度坚决地告诉他，我可以用一部分钱。 I could use some money, Sarah told him flatly.

[植] nut，nut fruit，mast ；

[例句] 把水果和坚果放进罐子里，用白兰地酒浸泡。 Pack the fruits and nuts into the jars and cover with brandy.

[例句] 鹰嘴豆有独特可口的坚果风味。 Chick peas have a distinctive, delicious and nutty flavour.

tough and tensile，firm and tenacious，diligency，tenacity ；

[例句] 她冷峻，坚韧而且风趣。 She's hard-boiled, tough and funny.

[例句] 坚韧是通向成功的桥. Tenacity is the bridge to success.

firm and persistent，with unswerving determination，with inflexible will，fortitude ；

[例句] 我总是为果敢坚毅的女性所吸引。 I've always been drawn to tough, gutsy women.

[例句] 格伦维尔上尉用坚毅的目光凝视着他。 Captain Grenville stared at him steely-eyed.

firmly believe，be firmly convinced，be fully confident of，conviction ；

[例句] 她坚信自己会出人头地。 She's absolutely certain she's going to make it in the world.

[例句] 她坚信人的本性是善良诚实的。 She had an unshakeable faith in human goodness and natural honesty.

steadfast and persevering (in face of difficulties)，long-suffering ；

[例句] 他们以坚忍刚毅的精神直面困境。 They bore their plight with stoicism and fortitude.

[例句] 她坚忍地承受这一切。 She put up with it all stoically.

hard，stiff，callous，flinty，firm ；

[例句] 针对他们各人不同的需要挑选柔软、软硬适中或者坚硬的床垫。 Choose a soft, medium or firm mattress to suit their individual needs.

[例句] 恐龙峡谷中的化石都嵌在坚硬的砂岩中。 The fossils at Dinosaur Cove are embedded in hard sandstones.

firm，grim，reassuring，stanch，adamant ；

[例句] 我当时不知道罗恩有那么坚强的个性。 I didn't know Ron had that much strength of character.

[例句] 他们面对困难表现了坚强的毅力。 They showed great perseverance in the face of difficulty.

determined，stern，[法] strong，decided，hard-set ；

[例句] 一位发言人称这一坚决的行动缓和了极为棘手的局面。 A spokesman said this firm action had defused a very nasty situation.

[例句] 我是那种非常坚决的人。 I am a very determined type of person.

firm，steady，[法] uncompromising，decisive，steadfast ；

[例句] 部长们表示了对该体制坚定的信心。 The ministers issued an affirmation of their faith in the system.

[例句] 年轻选民是坚定的亲欧派。 Younger voters are strongly pro-European.

solid，stable，[建] consolidus，firm，cast-iron ；

[例句] 这艘巡洋舰有坚固的装甲。 The cruiser was heavily armoured.

[例句] 厚实坚固的城堡围墙 the massive walls of the castle

claim，insist，state insistently ；

[例句] 一位发言人坚称这两起事件“绝无关联”。 A spokesman insisted the two events were "in no way related"

[例句] 然而，心理学家坚称他们并非一味灌输。 The psychologists insist, however, that they are not being prescriptive.

importunate，insistent，persistent ；

[例句] 在他们病得很重无法坚持的情况下，我被劝服去临时顶替他们。 I was persuaded to step into the breach temporarily when they became too ill to continue.

[例句] 可能要试几次，但还是值得坚持的。 It may take a number of attempts, but it is worth keeping at it.

uncompromisingly，with a firm hand，with a strong hand，with both feet，stoutly ；

[例句] “我会找催眠师试试，”我突然坚决地说。 "I think I'll try a hypnotist," I said with sudden resolution.

[例句] 萨拉态度坚决地告诉他，我可以用一部分钱。 I could use some money, Sarah told him flatly.