The Collaborative International Dictionary of English v.0.48:
Suffice \Suf*fice"\, v. i. [imp. & p. p. Sufficed; p. pr. &
vb. n. Sufficing.] [OE. suffisen, OF. soufire, F. suffire
(cf. suffisant, p. pr.), L. sufficere to put under, to
substitute, to avail for, to suffice; sub under + facere to
make. See Fact.]
To be enough, or sufficient; to meet the need (of anything);
to be equal to the end proposed; to be adequate. --Chaucer.
To recount almighty works,
What words or tongue of seraph can suffice? --Milton.