Webster's Revised Unabridged Dictionary · 1913

Amb-

Amb-

[Latin prefix ambi-, amb-, akin to Greek {not transcribed}, Sanskrit abhi, Anglo-Saxon embe, emb, Old High German umbi, umpi, German um, and also Latin ambo both. Compare Amphi-, Both, By.]

A prefix meaning about, around; -- used in words derived from the Latin.

Also: Ambi-