Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

instrēnŭē, adv., v. instrenuus, a, um, fin.

in-strēnŭus, a, um, adj., not brisk, inactive, sluggish, spiritless (poet. and in post-Aug. prose): homo, Plaut. Most. 1, 2, 23: animus, Ter. Heaut. 1, 1, 68: dux, Suet. Vesp. 4.
Adv.: instrēnŭē, without spirit: non instrenue moriens, Just. 17, 2, 1.