garron
noun
gar·ron ˈger-ən 
ˈga-rən,
gə-ˈrȯn Scotland and Ireland
: a small sturdy workhorse
Word History
Etymology
borrowed from Irish gearrán & Scottish Gaelic gearran "gelding, small horse," going back to Middle Irish gerrán, from gerr "short, castrated" (of uncertain origin) + -án, nominalizing suffix
Note: Earlier comparisons of Irish gerr (< *gers-?) with Greek cheírōn "worse, weaker" (nominative plural chérēes "of lower rank") or with Sanskrit hrasati "(it) is diminished, becomes small" are doubtful.
First Known Use
1540, in the meaning defined above