まるmaruっきりkkiri
1.

An adverb used to emphasize a complete absence or difference, often accompanied by a negative expression, indicating that something is entirely not as expected or different from what it used to be.

2.

A term that conveys an absolute state or condition, often highlighting the totality of a situation, suggesting that there is no trace or aspect of what is being negated.

3.

A phrase that denotes a total or thorough level of change or distinction, indicating that something bears no resemblance to its former state.

4.

An expression used to assert a total lack of similarity or connection between two subjects, reinforcing the idea of being fundamentally different.

Example:

おもってたのとまるっきり違いますねえ。