yìng​xìng

rigid

硬性 yìng​xìng
rigid
rigid; inflexible; unchangeable (usually describing rules, regulations, or requirements)
hardness
the physical property of being hard or difficult to damage
disposition
a stubborn or obstinate disposition or nature
hard
describing drugs that are addictive and harmful to the body (e.g. heroin)

Frequency

Movie subtitles
0.150 per million appears in 0% of films
Written text
2.13 per million

Sources