This is the 4223rd most frequent Catalan word.
estretes
Narrow.
Here, 'estretes' describes the physical narrowness of stairs in a building.
Les cases antigues del poble tenen escales estretes.
The old houses in the village have narrow stairs.
In this context, 'estretes' metaphorically means 'close' or 'tight' in terms of interpersonal relationships.
Les relacions entre els veïns s'han tornat estretes amb el temps.
The relationships between the neighbors have become closer over time.
'Estretes' here refers to the tight fit or small size of shoes that makes them uncomfortable.