This is the 491st most frequent Estonian word.
lapse
The Estonian word "lapse" means "child's" in English (genitive case of "laps," meaning "child").
In this sentence, 'lapsega' is the comitative case of 'laps', indicating 'with the child'.
Ma mängin lapsega pargis.
I am playing with the child in the park.
Here, 'lapse' is the genitive case of 'laps', showing possession or belonging: 'the book of the child'.
Selle lapse raamat on laual.
That child's book is on the table.
In this context, 'lapse' serves as an attributive genitive, indicating that the crying belongs to the child.