"do," pronounced with a long o, means "I give" in Latin. 'data' is the perfect-tense, passive participle -- "given" -- in the neuter gender, with plural number:

"do," pronounced with a long o, means "I give" in Latin. 'data' is the perfect-tense, passive participle -- "given" -- in the neuter gender, with plural number: literally "things given," but idiomatically "gifts."