In an illegitimate manner.

Not conforming to known principles, or established or accepted rules or standards. / Not in accordance with the law. / Born to unmarried parents.

A person born to unmarried parents.

(transitive) To make illegitimate.

plural of illegitimation

(obsolete) The act of making illegitimate; bastardization. / (obsolete) The state of being illegitimate; illegitimacy.

Quality of being illegitimate.

plural of illegitimate

simple past tense and past participle of illegitimize

present participle of illegitimize