P / pĭo
verb transitive

pĭo

2nd PP pĭāre · 3rd PP āvi · 4th PP ātum · conj. 1st
To seek to appease; to appease; propitiate
To seek to appease, to appease, propitiate by sacrifice (syn. place).—
Lit.: Silvanum lacte piabant, Hor. Ep. 2, 1, 143: ossa, Verg. A. 6, 379: busta (i.e. Manes), Ov. M. 13, 515: Janus Agonali luce piandus erit, id. F. 1, 318.—
by extension
To honor with religious rites; to celebrate
To honor with religious rites, to celebrate: ubi piem Pietatem, Plaut. As. 3, 1, 3: aras ture, Prop. 3, 10 (4, 9), 19: in magicis astra piare focis, to perform sacred rites, id. 1, 1, 20.—
To purify with sacred rites
To purify with sacred rites (syn.: procuro, lustro): si quid tibi piandum fuisset, Cic. Dom. 51.—
To make; seek to make good; to atone for
To make or seek to make good, to atone for, expiate: damna, Ov. A. A. 3, 160: mors morte pianda est, id. M. 8, 483: fulmen, to avert by sacrifice the misfortune portended by lightning, id. F. 3, 291: nefas triste, to atone for, avert the penalty, Verg. A. 2, 184; Ov. H. 19, 194: cometes terrificum sidus, ac non leviter piatum, Plin. 2, 25, 23, § 92.—
To punish; avenge
To punish, avenge: culpam morte, Verg. A. 2, 140: grande nefas et morte piandum, Juv. 13, 54.—
To free from madness
To free from madness, Fest. p. 213 Müll.: jube te piari de meā pecuniā: nam ego quidem insanum te esse certo scio, Plaut. Men. 2, 2, 17; so id. ib. 3, 2, 51.