A word element attached to a root word that changes its meaning is called an "affix."
The suffix is "-er" (sometimes called the agentive suffix) meaning "one who" when attached to a verb.
A prefix is a word part added to the end of a root word. It most often changes the ---- of the word
A rod to which a wheel or wheels is attached is an axle.
A word part is basically a couple of simple letters such as in, un, de. The simple use of putting the word part "un" in front of words completely changes the meaning to the opposite. ie. Something necessary becomes unnecessary, usual to unusual. Thereby simply adding a wordpart can completely change the meaning of a word.
A bucket that attached to a long pole and used to transfer river water is called a shadoof.
suffix
A suffix is a word element that is attached to the end of a word to change its meaning.
A prefix, such as "pre" added to "view" to create "preview".
Radiation?
transmutation - same as the alchemists called it.
This is a radioactive chemical element.
When an element polarity of voltage or current source changes, the magnitude of the corresponding current or voltage changes is called unilateral element. Eg: Diode Even Diode connected back to back in parallel act as a Bilateral.
"Transmutation" is the general term; this could also be called "nuclear reaction."
an isotope of an element
penis
It is radioactive decay.
It is - Transmutation, and Protons -