ballisto-

Etymology tree
Proto-Indo-European *gʷelH-der.
Proto-Hellenic *gʷəlnō
Ancient Greek βᾰ́λλω (bắllō)
Ancient Greek βαλλίστρᾱ (ballístrā)der.
Latin ballista
Proto-Indo-European *-ikos
Proto-Italic *-ikos
Latin -icuslbor.
Old French -iquebor.
Middle English -ik
English -ic
English ballistic
Ancient Greek -ο- (-o-)der.
Latin -o-bor.
English -o-
English ballisto-
From the noun ballistic and the interfix -o-.