hisco, ĕre
* V. inch. n. and a. [hio; whence also hiasco].
* Neutr., to open, gape, yawn.
* In gen.: tellus, ait, hisce,Ov. M. 1, 546; cf.: magnae nunc hiscite terrae, Poët. ap. Quint. 9, 2, 26: rima hiscit,Plin. 17, 14, 24, § 108: st, tace, aedes hiscunt,Plaut. Ps. 4, 1, 42.
* Act., to speak, relate any thing (poet.): hem vereor, plus quam fas est captivum hiscere, Att. ap. Non. 120, 30: quicquam,Ov. M. 13, 231: tantum operis nervis hiscere posse meis, Prop. 3, 3 (4, 2), 4 (for which: carmen hiare lyra,id. 2, 31 (3, 29), 6).

s. TLL