Houyhnhnm
/ˈhwɪnəm/
Definition 1 of 1
Pro Tip 1/3Pronunciation Clue
Pronounced 'hwi-nim,' like 'win' with 'h' at the start and 'nim' at the end. 
I had difficulty saying 'houyhnhnm' until I practiced the sound.
Pro Tip 2/3Literary Reference
Used specifically in discussing 'Gulliver's Travels' or comparing to pure rational beings. 
Her leadership style was as measured as that of a houyhnhnm.
Pro Tip 3/3Symbolism
Houyhnhnms symbolize an ideal of reason beyond human attainment. 
In an argument, he is as uncompromising and logical as a houyhnhnm.