verheiratet
married
Having the legal status of marriage; living in a marriage with someone.
Meine Schwester ist seit fünf Jahren glücklich verheiratet.
My sister has been happily married for five years.

married
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married
Having the legal status of marriage; living in a marriage with someone.
Meine Schwester ist seit fünf Jahren glücklich verheiratet.
My sister has been happily married for five years.

'Verheiratet' (married) is the past participle of the verb 'verheiraten' (to marry off / to get someone married) and is used as an adjective. It describes a state and is always used together with the verb 'sein' (to be).
Sind deine Eltern noch verheiratet?
Are your parents still married?
To name the person someone is married to, you use the preposition 'mit' followed by the dative. The corresponding question is: 'Mit wem ist er/sie verheiratet?' (Who is he/she married to?)
Er ist mit einer berühmten Schauspielerin verheiratet.
He is married to a famous actress.
Do not confuse the state 'verheiratet sein' (to be married) with the action 'heiraten' (to marry / to get married). 'Heiraten' describes the moment of getting married, while 'verheiratet sein' describes the ongoing status.
Sie haben letztes Jahr geheiratet.
They got married last year.
You can recognize the figurative meaning when a person is 'mit' (with / to) a thing (not a person) 'verheiratet' (married). Most often, this refers to a very strong attachment to work or a hobby.
Mein Chef arbeitet Tag und Nacht, er ist quasi mit seiner Arbeit verheiratet.
My boss works day and night; he's basically married to his job.
to marry / to marry off
'verheiraten' and 'verheiratet' look very similar and both belong to the topic of marriage. But the difference is important: 'verheiraten' is a verb and describes an action or entering into marriage, especially in 'sich verheiraten' (to get married). 'verheiratet' is an adjective and describes the state afterward. Learners often confuse them because the forms are almost the same. You say 'Sie hat sich verheiratet' for the action, but 'Sie ist verheiratet' for marital status.

Ich bin seit zehn Jahren verheiratet.
I have been married for ten years.
Meine Schwester hat sich im Mai verheiratet.
My sister got married in May.