List of Old English Words in the OED/UM

Um	pfx	This prefix was once as common to English as it still is to German verbs and was a prefix in many ME. verbs ("ymb"; umb; umbe) meaning "around", around" "about", as umstand to stand round, guard; umbeset to beset, surround, best on every side; umbego to go around, encircle, UMBETHINK. Um is a reduced form of umb- was ad. ON, umb, corresponding to OE ymb, ymbe, prefix, ymbe prep. umbe- repr. OE. ymbe is partly an extension of umb partly a combination of um- with "be-", Latin ambi is a cognate.
Umbeclead	vb	To clothe, wrap up, swathe
Umbeclip	vb	To surround, encircle, clutch, hug, grip around, embrace, clasp around.
Umbedelve	vb	Dig around
Umbegang	vb	To surround, go around.
Umbego	vb	To go around, to encircle, to surround with something.
Um-be-grip	vb	To sieze or grip round.
Um-be-set	vb	To beset on every side.
Umbeshadow	vb	To shade around.
Umbeshear	vb	To circumcise.
Umbestound	adv	At times, sometimes, after a short time; umbestoundingly.
Umbethink	vb	To think about, to think about oneself, consider, remember, to call to mind. Also: "Um-be-thinke" - to bethink one's self of all surroundings (or circumstances), to remember.
Umbethinking	n	Consideration, recollection, recalling, reflection.
Umbeweave	vb	To wrap around.
Umbewhile	adv	After a time, at times, sometimes.
Umest	adj	Of clothes: uppermost or outermost, applied to the coverlet of a bed, claimed by the priest as requisite on the death of a parishioner. 2. of things or places: lying highest or uppermost. 3. most important or prominent.
Umgamg	n	Circuit, circumference.
Umgo	vb	To go around, encompass.
Umset	vb	To invest, surround.
Umstroke	n	Circumference, edge.
Umthink	vb	To think, consider, reflect.