The term 'prefix akin to 'ULTRA'' can be answered with the word 'uber, ' which is a four-letter word. Uber is a German prefix meaning 'OVER' or 'ABOVE, ' and is often used in English to mean 'EXTREMELY' or 'VERY.' It is commonly used in words such as 'ubercool, ' 'ubersmart, ' and 'ubermodern.'