堅

having one's guard up; not showing weak points

Esp. ガードが堅い

(of women) resisting attempts of being hit on; being distrustful of potential love interests; prudish

Common noun

old-fashioned way of thinking; old-fashioned spirit

Nouns which may take the genitive case particle 'no'; Adjectival nouns or quasi-adjectives (keiyodoshi)

old-fashioned

Noun or verb acting prenominally

America; American

fist

reef knot; flat knot; square knot

hard-baked; hard

honest; upright; faithful; reliable

medium-sized enterprise (business, firm)

discreet; tight-lipped

(a fortress being) impregnable; unassailable

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

being of firm (unshakable) faith and strict practice

stable (market) after having bottomed out

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

of strict morals (moral principles); highly moral

log on the roof of a shrine set perpendicular to the ridgepole

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

Baseball

center fielder; centre fielder

chaste woman; virtuous woman

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

Proverb

a wholesome household can not be disturbed from the outside; a house divided against itself cannot stand; a firm fence keeps the dogs out

firm and solid; sturdy and indestructible; unshakable; adamantine

firmness; hardness; stiffness; honesty

sky; moon

underworld; netherworld