data opera

[Lavrentivs]

Quid autem nunc, ubi suppono deceptorem aliquem potentissimum, &, si fas est dicere, malignum, datâ operâ in omnibus, quantum potuit, me delusisse?

I do not undestand the abs. abl. (?) data opera. Nor the perf. inf. deluisse (why not præs.?).

[adrianus]

Quid autem nunc, ubi suppono deceptorem aliquem potentissimum, &, si fas est dicere, malignum, datâ operâ in omnibus, quantum potuit, me delusisse?

"But what [am I] now, when I imagine that some very powerful and, if I may say so, malevolent deceiver, painstakingly [by pain given] in all ways/things that he possibly could, has duped me."

1. Operam dare, to bestow care or pains on, to give attention to any thing....
2. In abl.: operā meā, tuā, etc., through my (thy, etc.) means, agency, fault: “fateor Abiisse eum abs te, meā operā atque astutiā,” Plaut. Capt. 3, 5, 21: “quid mihi nisi malum vostra opera'st?” id. Ps. 1, 2, 50: “non meā operā, neque pol culpā evenit,” Ter. Hec. 2, 1, 31: “meā operā, Q. Fabi, Tarentum recepisti,” Cic. Sen. 4, 11.—