also 固い · 堅い
- i-adjective, esp. 固い and 堅い for wood, 硬い for metal and stone hard; solid; tough
- stiff; tight; wooden; unpolished (e.g. writing)
- strong; firm (not viscous or easily moved)
- safe; steady; honest; steadfast
- obstinate; stubborn
- bookish; formal; stuffy