noun which may take the genitive case particle 'no', na-adjective, noun
skyrocketing; ceilingless; unbounded
Describes prices, values, or abstract measures that seem to rise without limit. Often used in economic or figurative contexts.
この地域の地価は天井知らずだ。
Land prices in this area are skyrocketing without any ceiling.
彼の欲は天
His greed knows no bounds; no matter how much he earns, he is never satisfied.