Webster's Revised Unabridged Dictionary
OF. aquest, F. acquêt, fr. LL. acquestum, acquisītum, for L. acquisītum, p. p. (used substantively) of acquirere, to acquire. See Acquire
Chambers's Twentieth Century Dictionary
O. Fr.—L. acquisitus, acquirĕre. See Acquire.
En vostre lict, par nuict obscure et brune, Pour acquester richesses a grans sommes.
"A Short History of French Literature" by George Saintsbury
And in the pursuit and acquest of this knowledge he stuck neither at any labour or cost.
"Lives of Eminent Zoologists, from Aristotle to Linnæus" by William MacGillivray