กระรอก • (grà-rɔ̂ɔk) (classifier ตัว)
From Khmer កំប្រុក (kâmbrŏk, “squirrel”), with hypercorrection by association with กระ (grà, “intensifying prefix”).
Cognate with Lao ກະຮອກ (ka hǭk) and Vietnamese sóc.