You searched for: “illegalize
illegalize (verb), illegalizes; illegalized; illegalizing
To declare something unlawful: When Tom's city police set a new curfew, they illegalized children and teenagers being out after certain hours at night without their parents or other adults.

Your town might illegalize smoking in certain places or your state senators could vote to illegalize dogs and cats fighting each other!

It's considered better grammar to say "to make illegal," or even "to criminalize," because to illegalize is probably known by very few people since it is a relatively new verb that is constructed from illegal, "against the law", and the verb-suffix or ending -ize.

This entry is located in the following units: -ize (page 5) leg-, lex (page 1)