This is the 363rd most frequent Persian word.
بستری
The Persian word "بستری" means "hospitalized" or "bedridden."
The word "بستری" is used as a verbal noun meaning "being hospitalized."
آن بیمار در بیمارستان بستری شد.
That patient was hospitalized.
"بستری" here refers to a metaphorical foundation or framework.
برای موفقیت، باید بستری مناسب فراهم کرد.
To succeed, you must provide a suitable platform.
In this case, "بستری" refers to the physical bed of the river.