ūmesco — Lewis & Short
ūmesco (less correctly hū-), no
I perf. nor sup., ĕre, 3, v. inch. n. [umeo], to grow moist or wet (poet. and in post-Aug. prose):
(equi) umescunt spumis,Verg. G. 3, 111:
cortex non umescit,Plin. 17, 14, 24, § 107:
terra umescens rore occulto,id. 18, 34, 77, § 339:
solum,Pall. Sept. 10, 3:
vidimus umescentes oculos tuos,Plin. Pan. 73, 4.