Not necessarily only square root. Taking a root is the inverse of raising a number to a power.

(e) Exponents

For exponents, there is a noun qovDa' for the name of the operation, however the idea of raising a number to the power of something is generally expressed by using the verb Sep. For example "2^3=8" is wejlogh Sep'egh cha'; chen chorgh ("3 times, 2 breeds with itself, eight forms").