APEX n.
The tip, top, point, or angular summit of anything; as, the apex of a mountain, spire, or cone; the apex, or tip, of a leaf.
ASSIZE n.
Anything fixed or reduced to a certainty in point of time, number, quantity, quality, weight, measure, etc.; as, rent of assize. Glanvill. Spelman. Cowell. Blackstone. Tomlins. Burrill.
AT prep.
ource, occasion, reason, consequence, or effect; as, at the sight; at this news; merry at anything; at this declaration; at his command; to demand, require, receive, deserve, endure at your hands.