binary mathematical operator: nth root of; inverse power [a to the 1/b power].

- fenra
- x
_{1}is a crack/fissure/pass/cleft/ravine/chasm/[defect/flaw] [shape/form] in x_{2}.

- seltenfa
- x
_{1}is an x_{3}rd root of x_{2}. - toltenfa
- x
_{1}is the exponential root of x_{2}with exponent x_{3}// x_{1}is the x_{3}th root of x_{2}// x_{1 }= \sqrt[x_{3]x} - fau'e
- iterated function left-composition with self: f∘f∘...∘f, n times.
- enfa
- x
_{1}abstractly pertains to an exponential/root/logarithmic relationship between the elements of x_{2}(ordered pair) which are related via concrete relationship x_{3}.