When the houyhnhnms saw Gulliver they were surprised to see him.He was just like the Yahoos but very hygienic and rational. He wasn't dirty and filthy as those Yahoos. When they saw him, they started talking to each other in their language and used two words very oftenly 'Yahoos' and 'Houyhnhnms'. Gulliver learnt to pronounce them. Houyhnhnms were very pleased at this. They understood his sign language and took him where he could lodge.