The phrase "take aback" means to surprise or shock someone. Its antonyms are words that convey a lack of surprise or shock. These include words like anticipate, expect, and prepare. When you expect something, you are not taken aback when it happens. You are mentally and emotionally prepared for it. On the other hand, when you are caught off guard or unprepared, you may be taken aback. Other antonyms for "take aback" include "calm," "comfort," and "reassure." These words are used to convey a sense of ease or relaxation, rather than shock or surprise.