before vowels archae-, word-forming element in scientific compounds meaning "ancient, olden, primitive, primeval, from the beginning," from Latinized form of Greek arkhaios "ancient, primeval," from arkhē "beginning," verbal noun of arkhein "to be the first," hence "to begin" (see archon).
arch-
arch
-arch
Archaean
archaebacteria
archaeo-
archaeoastronomy
archaeological
archaeologist
archaeology
archaeopteryx