The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
kau-
DEFINITION:
To hew, strike. 1a.hew, from Old English hawan, to hew; b.haggis, haggle; hacksaw, from Old Norse höggva, to cut; c.hoe, from Old French houe, a hoe. a–c all from Germanic *hawwan.2.hag2, from a source akin to Old Norse högg, a gap, a cutting blow, from Germanic *haww.3.hay, from Old English heg, hay, cut grass, from Germanic *haujam.4. Suffixed form *kau-do-.incus, from Latin cdere (< *caudere), to strike, beat. (Pokorny ku- 535.)
awan, to hew; b. haggis, haggle; hacksaw, from Old Norse höggva, to cut; c. hoe, from Old French houe, a hoe. a–c all from Germanic *hawwan. 2. hag2, from a source akin to Old Norse högg, a gap, a cutting blow, from Germanic *haww
. 3. hay, from Old English h
eg, hay, cut grass, from Germanic *haujam. 4. Suffixed form *kau-do-. incus, from Latin c
dere (< *caudere), to strike, beat. (Pokorny k
u- 535.) 
