Where does “pet” come from?

pet (Middle English) comes from Old English pytt, from Proto-West Germanic puti, from Latin puteus, from Latin -al — noun-forming suffix.

Ancestry of “pet”, step by step

StepLanguageWordMeaning
1Old Englishpyttpit; well, pool; grave
2Proto-West Germanicputiwell
3Latinputeuspit, dungeon; well; cistern
4Latin-alnoun-forming suffix
Every word from Latin -al →Every word from Latin puteus →Every word from Proto-West Germanic puti →
pet — Etymology, Origin & Word History | Etymology Explorer