This is the 9831st most frequent Turkish word.
atmasını
"Atmasını" means "its throwing" or "the act of it throwing" in English.
Here, 'atmasını' is derived from the root 'atmak' which means 'to throw' or 'to discharge', and is used to describe the action of increasing its intensity or discharge.
Rüzgar, saat başı atmasını hızlandırdı.
The wind increased its throwing/intensity every hour.
In this context, 'atmasını' comes from the verb 'atmak', which in relation to 'kalp' (heart) refers to 'to beat', describing the physiological action of the heart.
Kalbinin hızlı atmasını hissetti.
She felt her heart beating fast.
'Atmasını' here is referring to the sound or ticking action of a clock, again using the root 'atmak' to describe a rhythmic or repeated activity.