Original: "Ignoratio elenchi" can be roughly translated by ignorance of refutation, that is, ignorance of what a refutation could logically be; "elenchi" (genitive singular of the Latin elenchus) is from the Greek, meaning an argument of disproof or refutation.
Simplified: "Ignoratio elenchi" can be roughly translated by ignorance of refutation, that is, ignorance of what a refutation is; "elenchi" is from the Greek ((Socratic method)), meaning an argument of disproof or refutation.