Greek word
opísō
ὀπίσω
What it means
to the back, i.e. aback (as adverb or preposition of time or place
to the back, i.e. aback (as adverb or preposition of time or place; or as noun)
Where it comes from
from the same as ópisthen (ὄπισθεν) with enclitic of direction