untiring

Etymology
From.

Adjective

 * 1) Not able to be tired; inexhaustible.
 * 2) Unfailing; resolute.

Translations

 * Bulgarian:
 * Danish: utrættelig
 * Greek:
 * Ancient: ἀκάματος, ἀκάμας, ἀκοπίαστος
 * Norwegian:
 * Bokmål: utrettelig, utrøttelig
 * Nynorsk: utrøytteleg
 * Tocharian B: ekwalatte