What is the past tense of legitimate?

The past tense of legitimate is legitimated.

legitimate

Common synonyms for legitimate include legalize, legalise, decriminalize, decriminalise, legitimize, legitimise, legitimatize, legitimatise.

/lɪˈd͡ʒɪt.ɪ.mət/verb, adjective4 syllables

Legitimate means: of marriages and offspring; recognized as lawful.

verb, as in make legal

legalize, legalise, decriminalize, decriminalise, legitimize, legitimise, legitimatize, legitimatise

adjective, as in of marriages and offspring; recognized as lawful

lawfully-begotten, morganatic, left-handed, true, lawful, rightful, authorized, authorised, authoritative, legal, valid

adjective, as in authorized, sanctioned by, or in accordance with law

adjective, as in based on known statements or events or conditions

adjective, as in in accordance with recognized or accepted standards or principles

also used for legitimate

de jure, legit, acceptable, allowable, leveful, permissible, bona fide, pukka, actual, authentic, genuine, lubish, non-fake

Includes material from Wiktionary, CC BY-SA 4.0.

adjective

of marriages and offspring; recognized as lawful

authorized, sanctioned by, or in accordance with law“a legitimate government”

based on known statements or events or conditions“rain was a logical expectation, given the time of year”

in accordance with recognized or accepted standards or principles“legitimate advertising practices”

verb

make legal“Marijuana should be legalized”

show or affirm to be just and legitimate

make (an illegitimate child) legitimate; declare the legitimacy of (someone)“They legitimized their natural child”

Definitions from the Open English WordNet, CC BY 4.0.

This is not a legitimate escort listing, it's a trap by the police.sabretou
In my estimation, this is a legitimate purpose.Nylez
We consider it the citizens' legitimate right to have public libraries.Swift
Which prince is the legitimate heir to the throne?CM
We consider public libraries a legitimate citizen's right.Swift
I won't divorce you unless you give me a legitimate reason.CM
The state has a monopoly on legitimate violence.mailohilohi
Becoming a literate news consumer requires us to be able to identify legitimate journalism.Hybrid

Sentences from Tatoeba, CC BY 2.0 FR, credited to their authors.

as a verb