Where does “raticida” come from?

raticida (Spanish) comes from Spanish rata, from Latin rēōr, from Proto-Italic rēōr, from Proto-Indo-European h₂reh₁-, from Proto-Indo-European h₂er- — to fit, to fix, to put together.

raticida (Spanish): rat poison

Definitions

rat poison

Ancestry of “raticida”, step by step

Step	Language	Word	Meaning
1	Spanish	rata	stingy, miser, tight-fisted; rat, jerk; rat,...
2	Latin	rēōr	to reckon, calculate
3	Proto-Italic	rēōr	to reckon, to calculate; to think, to deem, to...
4	Proto-Indo-European	h₂reh₁-	to think, reason; to arrange
5	Proto-Indo-European	h₂er-	to fit, to fix, to put together

Every word from Proto-Indo-European h₂er- →Every word from Proto-Indo-European h₂reh₁- →Every word from Proto-Italic rēōr →