硬い: keeping its physical shape or appearance under a force: stiff / 固い: keeping its shape or behaviour even under other influences: hard, firm

(phonetics) palatal

nature reserve

bold typeface

(pathology, immunology) pathogen

(physics) an isotope

a blanket term for various styles of Japanese hand-to-hand martial arts, either wholly unarmed or using short weapons / jujutsu / short for 武神館武道体術(ぶじんかんぶどうたいじゅつ) (Bujinkan Budō Taijutsu)

powder

(ophthalmology) vitreous body

(ophthalmology) Alternative form of 硝子体