Meaning of Aback
Bangla: পিছনে, পশ্চাতে, পশ্চাদ্দিকে, ফিরে
चकित कर देना, चकित हो जाना
Unknown / অজানা / अज्ञात
toward the back.
Nautical. so that the wind presses against the forward side of the sail or sails.
(of a sail) positioned so that the wind presses against the forward side.
(of a yard) positioned so that its sail is laid aback.
taken aback, surprised and disconcerted: I was taken aback by his harsh criticism.