檻

banister / balustrade / cage for animal or prisoner / to transport caged prisoner on a cart

door sill / threshold

(bound form) tree / (bound form) wood / unresponsive; numb; wooden

to supervise / to inspect / jail / prison

supervisor

doorstep / sill / threshold / fig. knack or trick (esp. scheme to get sth cheaper)

Mr Zhu Yun breaks the railing (idiom); to challenge and admonish boldly

nuclear threshold

a flower in a cage, a crane in a basket (idiom); prisoner

cart with cage, used to escort prisoner

cage (for animals)

bird in a basket, monkey in a cage (idiom); prisoner

to wear out the doorstep (idiom) / to crowd at sb's door

railings of a balcony

railing / fence / banisters

see 闌檻|阑槛[lan2 jian4]

carved pillar, jade doorsill (idiom); heavily decorated environment

cloud around the window, mist on the threshold (idiom); tall building with the windows in the clouds

doorsill