The Collaborative International Dictionary of English v.0.48:
Insist \In*sist"\, v. i. [imp. & p. p. Insisted; p. pr. & vb.
n. Insisting.] [F. insister, L. insistere to set foot upon,
follow, persist; pref. in- in + sistere to stand, cause to
stand. See Stand.]
1. To stand or rest; to find support; -- with in, on, or
upon. [R.] --Ray.
2. To take a stand and refuse to give way; to hold to
something firmly or determinedly; to be persistent,
urgent, or pressing; to persist in demanding; -- followed
by on, upon, or that; as, he insisted on these conditions;
he insisted on going at once; he insists that he must have
Insisting on the old prerogative. --Shak.
Without further insisting on the different tempers
of Juvenal and Horace. --Dryden.
Syn: Insist, Persist.
Usage: Insist implies some alleged right, as authority or
claim. Persist may be from obstinacy alone, and either
with or against rights. We insist as against others;
we persist in what exclusively relates to ourselves;
as, he persisted in that course; he insisted on his
friend's adopting it. --C. J. Smith.