The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
oi-no-
DEFINITION:
One, unique. Derivatives include once, atone, union, universe, and any. I. Basic form *oi-no-.1a.a1, an1, once, one; alone, anon, atone, lone, lonely, none, from Old English n, one; b.eleven, from Old English endleofan, eleven, from Germanic compound *ain-lif-, “one left (beyond ten),” eleven (*lif-, left over; see leikw-); c.einkorn, turnverein, from Old High German ein, one. a–c all from Germanic *ainaz.2. uni-, union, unite, unity; coadunate, triune, unanimous, unicorn, universe, from Latin nus, one. 3.indricothere, from Old Russian in, one. 4. Latin nn, not (< *ne-oinom, “not one thing”; see ne). II. Suffixed form *oino-ko-.a.any, from Old English nig, one, anyone, from Germanic *ainigaz;b.unique, from Latin nicus, sole, single; c.inch1, ounce1, uncial; quincunx, from Latin ncia, one twelfth of a unit. III. Suffixed form *oino-lo- in Latin llus (see ne). (Pokorny 3. D. e- 281.)
n, one; b. eleven, from Old English endleofan, eleven, from Germanic compound *ain-lif-, “one left (beyond ten),” eleven (*lif-, left over; see leikw-); c. einkorn, turnverein, from Old High German ein, one. a–c all from Germanic *ainaz. 2. uni-, union, unite, unity; coadunate, triune, unanimous, unicorn, universe, from Latin 
nus, one. 3. indricothere, from Old Russian in
, one. 4. Latin n
n, not (< *ne-oinom, “not one thing”; see ne). 
nig, one, anyone, from Germanic *ainigaz; b. unique, from Latin 
