Where does “atirador” come from?

atirador (Portuguese) comes from Portuguese atirar, from Portuguese tiro, from Latin Tyrus, from Ancient Greek τυρός, from Proto-Hellenic tūrós, from Proto-Indo-European tuh₂-ró-s, from Proto-Indo-European tewh₂- — to swell; to crowd; to be strong.

atirador (Portuguese): shooter; sniper; marksman, dead shot

Definitions

shooter; sniper; marksman, dead shot

Ancestry of “atirador”, step by step

Step	Language	Word	Meaning
1	Portuguese	atirar	to throw; to fire
2	Portuguese	tiro	the act of shooting; a fired shot; shooting...
3	Latin	Tyrus	Tyre
4	Ancient Greek	τυρός	cheese
5	Proto-Hellenic	tūrós	cheese
6	Proto-Indo-European	tuh₂-ró-s	—
7	Proto-Indo-European	tewh₂-	to swell; to crowd; to be strong

Every word from Proto-Indo-European tewh₂- →Every word from Proto-Indo-European tuh₂-ró-s →Every word from Proto-Hellenic tūrós →