the act of mixing; the state of being mixed; a mixing or mingling of two or more things, typically in an undesirable way

to mix one thing into another, typically in an undesirable way / to mingle, to become mixed, to get mixed, typically in an undesirable way

join, become a member

annual income or revenue

To fill in, to fill out (such as forms or papers), to enter (such as into a field on a form).

hold, suspension

defer, suspend

preconception / prejudice

infiltration

to infiltrate