ETYMOLOGY
from under-;
(From E-NED: In Old English, various secondary meanings of under- are represented by such verbs as under(be)ᵹinnan (to begin or attempt), underfón (to receive), underᵹietan, -niman, -standan (to understand), undersécan (to investigate))
EXAMPLE
“…Ȝif hie cumeð fram mannen, hie cann hwatliche underfinden, an hwos half he is icumen, and ðar after hie hine underfengð …”
From: Vices and Virtues : a Soul’s Confession of its Sins with Reason’s Description of the Virtues,
A Middle-English Dialogue of about 1200 A.D.
Lexicophilia 