(adjective) : in-dēfessus, a, um
* Unwearied, indefatigable (poet. and post-Aug.): dextra,Verg. A. 11, 651: agendo,Ov. M. 9, 199: assiduus et indefessus,Tac. A. 16, 22: Germani ob prospera indefensi,id. ib. 1, 64.— Hence, indēfessē and indēfessim, advv., unweariedly (both post-class.).
* Form indefesse: et benigne agere omnia,Aus. Grat. Act. 35; Spart. Hel. 5, 10.
* Form indefessim: expetere bonorum amicitias,Sid. Ep. 3, 2; Claud. Mam. Stat. Anim. 1, 7.

s. TLL