gratulate
To express joy at (an event or situation).
archaic
To gratify the good Andronicus, / And gratulate his safe return to Rome, / The people will accept whom he admits.
To greet, welcome, salute.
archaic
Queen Elizabeth. […] Whither away? / Lady Anne. No farther than the Tower; and, as I guess, / Upon the like devotion as yourselves, / To gratulate the gentle princes there.
Where it comes from
First attested circa 1567; borrowed from Latin grātulātus, perfect active participle of grātulor, see -ate (verb-forming suffix).
Adapted from the Wiktionary entry gratulate (CC BY-SA 4.0).