History and Etymology
Noun
Middle English
egge, going back to Old English
ecg "cutting side of a blade, border," going back to Germanic
*agjō "cutting side of a blade" (whence also Old Frisian
eg "cutting side of a blade, sword," Old Saxon
eggia, Old High German
egga, ekka "cutting side of a blade, border, point, corner," Old Norse
egg "cutting side of a blade"), feminine noun derivative from Indo-European
*h2eḱ- "sharp, pointed," whence also Latin
aciēs "sharp part of a weapon"
NOTE: The base *h2eḱ- "sharp, pointed" was productive of a large number of suffixed derivatives in the Indo-European daughter languages. Latin had a verbal base deriving from h2eḱ-eh1- "to be sharp" (see acetic acid, acid entry 2) and a presumed adjectival stem *acū- "sharp" (see acute). An apparently isolated derivative is Greek akmḗ "highest point" (see acme). For the derivative *h2eḱ-r-/h2oḱ-r-, with outcomes in Greek, Latin, and other languages, see acro-, mediocre. See also awn, ear entry 2.
Verb
Middle English
eggen "to set (the teeth) on edge," derivative of
egge edge entry 1