The X craneal nerve (vagus), it goes all the way to your diafragm
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 11 words with the pattern T--F--I--. That is, nine letter words with 1st letter T and 4th letter F and 7th letter I. In alphabetical order, they are: taffeties taffrails telfering tiffanies tiffining trifacial trifolies trifolium triforial triforium truffling
Fifth, or trifacial, or trigeminal, is the largest cranial nerve It has three divisions : (1) The ophthalmic, which leaves th6 cranium through the sphenoidal fissure, and sends branches to the skin of the forehead, the lachrymal gland, the eye, and the nose (sensory). (2) The superior maxillary leaves the cranium by the foramen rotundum ; it supplies the skin of the temple, cheek, nose, upper lip, upper teeth, and the mucous lining of the mouth and pharynx (sensory). (3) The inferior maxillary leaves the cranium through the foramen ovale ; it gives branches to the temple and external ear, the teeth, and lower jaw, and supplies the tongue with a nerve of taste (motor and sensory).