This is the 17759th most frequent Russian word.
укрытиях
"Shelters" or "coverings."
Here, 'укрытиях' refers to physical places used for shelter or hiding purposes.
На старых укрытиях мы нашли следы животных.
On the old shelters, we found traces of animals.
In this case, 'укрытиях' denotes places of refuge or protection from external conditions.
Они прятались в укрытиях, спасаясь от грозы.
They hid in shelters, escaping from the storm.
Here, 'укрытиях' implies places naturally or artificially created as hiding or living spaces.