• 堅固けんご

  solid, strong, firm

• 堅持けんじ

  holding on to, sticking to

• 堅調けんちょう

  firm (market), bullish

• 堅実けんじつ

  steady, sound, stable, safe (e.g. business), reliable, trustworthy, solid

• 中堅ちゅうけん

  nucleus, backbone, mainstay, key figure

• 手堅いてがたい

  sound, sure, safe, secure, trustworthy, reliable, solid

• 堅果けんか

  nut

• 堅木かたぎ

  hardwood

• 堅材けんざい

  hard wood

• 堅陣けんじん

  stronghold

• 堅塁けんるい

  stronghold

• 堅志けんし

  iron purpose

• 堅忍けんにん

  perseverance

• 堅炭かたずみ

  hard charcoal

• 堅守けんしゅ

  strong defense, strong defence

• 堅城けんじょう

  strong fortress

• 堅信けんしん

  confirmation (rite)

• 堅強けんきょう

  robust, strong, tough

• 堅人かたじん

  square, trustworthy person

• 堅牢けんろう

  solid, strong, sturdy, durable, stout

• 堅物かたぶつ

  straight-laced person, stubborn person

• 堅雪かたゆき

  snow with a frozen crust on top, crusted snow

• 堅気かたぎ

  honest, respectable, decent

• 堅豆腐かたとうふ

  firm tofu, hard tofu

• 堅パンかたパン

  hard biscuits, hardtack

• 堅太りかたぶとり

  solidly built person

• 堅信礼けんしんれい

  (the Christian sacrament of) confirmation

• 堅頭竜けんとうりゅう

  pachycephalosaur (any dinosaur of infraorder Pachycephalosauria)

• 米利堅メリケン

  America, American

• 物堅いものがたい

  honest, upright, faithful, reliable

• 口堅いくちがたい

  discreet, tight-lipped

• 底堅いそこがたい

  stable (market) after having bottomed out

• 中堅手ちゅうけんしゅ

  center fielder, centre fielder

• お堅いおかたい

  prudish, strait-laced, boring, square

• 堅い商売かたいしょうばい

  sound business

• 堅白同異けんぱくどうい

  sophism, sophistry, quibbling

• 堅牢堅固けんろうけんご

  firm and solid, stout and durable

• 堅苦しいかたくるしい

  formal, stiff, strict, ceremonious

• 堅忍持久けんにんじきゅう

  dogged perseverance, untiring patience

• 堅忍不抜けんにんふばつ

  indomitable perseverance, invincible fortitude

• 道心堅固どうしんけんご

  being of firm (unshakable) faith and strict practice

• 道徳堅固どうとくけんご

  of strict morals (moral principles), highly moral

• 用心堅固ようじんけんご

  very cautious (watchful, vigilant), taking every possible precaution

• 口が堅いくちがかたい

  tight-lipped, able to keep a secret

• 中堅企業ちゅうけんきぎょう

  medium-sized enterprise (business, firm)

• 意志堅固いしけんご

  strong determination, strong-willed, having strong will power, firmness of purpose

• 要害堅固ようがいけんご

  (a fortress being) impregnable, unassailable

• 口の堅いくちのかたい

  tight-lipped, able to keep a secret

• 志操堅固しそうけんご

  being faithful to one's principles, being of firm purpose and deep commitment, constancy, true blue

• 貞操堅固ていそうけんご

  chaste (usu. to one's husband), faithful