probably strengthened from a presumed derivative of the base of τομώτερος; the mouth (as if a gash in the face); by implication, language (and its relations); figuratively, an opening (in the earth); specially, the front or edge (of a weapon):--edge, face, mouth.
from διά and ἔρχομαι; to traverse (literally):--come, depart, go (about, abroad, everywhere, over, through, throughout), pass (by, over, through, throughout), pierce through, travel, walk through.