ago (Greek #71)
properly, to lead; by implication, to bring, drive, (reflexively) go, (specially) pass (time), or (figuratively) induce
KJV usage: be, bring (forth), carry, (let) go, keep, lead away, be open.
Pronounce: ag'-o
Origin: a primary verb
sun (Greek #4862)
with or together (but much closer than 3326 or 3844), i.e. by association, companionship, process, resemblance, possession, instrumentality, addition, etc.
KJV usage: beside, with. In composition it has similar applications, including completeness.
Pronounce: soon
Origin: a primary preposition denoting union