I / indēfătīgābĭlis
adjective

indēfătīgābĭlis

neut. indēfătīgābĭle
2. in-defatigo
that cannot be wearied; indefatigable
that cannot be wearied, indefatigable (post-Aug.): vigilia, Sen. de Ira, 2, 12, 7.