Meaning of ABACK in English

ABACK

a ‧ back /əˈbæk/ BrE AmE adverb

[ Date: 1100-1200 ; Language: Old English ; Origin: on bæc 'backward' ]

be taken aback (by something) to be very surprised or shocked by something:

For a moment, I was completely taken aback by her request.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.