Noah Webster
Pet
PET, noun [This word may be contracted from petulant, or belong to the root of that word. Peevish, which is evidently a contracted word, may be from the same root.]
A slight fit of peevishness or fretful discontent.
Life given for noble purposes must not be thrown away in a pet nor whined away in love.
PET, noun [formerly peat. Latin peto.]
1. A cade lamb; a lamb brought up by hand.
2. A fondling; any little animal fondled and indulged.
PET, verb transitive To treat as a pet; to fondle; to indulge.