This is the 12148th most frequent Polish word.
maleć
"Maleć" means "to decrease" or "to diminish" in English.
Here 'maleć' is used to describe the reduction in housing prices.
Ceny mieszkań zaczęły maleć w ostatnim kwartale.
Housing prices started to decline in the last quarter.
In this sentence, 'maleć' indicates the decrease in the size of a group.
Wygląda na to, że nasza grupa zaczyna maleć.
It seems that our group is beginning to shrink.
Here the use of 'maleć' expresses a gradual reduction in faith or confidence.