In general: the body, e.g. of a human or animal / substance; matter / form; shape / (algebra) field (commutative ring with invertible nonzero elements)

outward appearance; look; aspect

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

general build and appearance (of the body)

(phonetics) palatal

(physics) an isotope

cursive script, cursive writing style

bold typeface

(pathology, immunology) pathogen

a lifeform