pĕr-infirmus

a, um, adj.
I. very weak or feeble: si quis perinfirmus est, Cels. 2, 14: sunt enim levia et perinfirma, quae dicebantur a te, Cic. Fin. 2, 16, 53; Cels. 2, 14 fin.
Lewis & Short
A Latin Dictionary, 1879
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