Tireless

adj

Definitions

Adjective
  1. 1
    Indefatigable, untiring and not yielding to fatigue not-comparable

    "James Milner's angled free-kick was headed on to the post by the tireless Bent and Lampard the opportunist was perfectly placed to stoop and head in from virtually on the goal-line."

  2. 2
    Without a tire (wheel covering); tyreless. US, not-comparable
Adjective
  1. 1
    characterized by hard work and perseverance wordnet
  2. 2
    showing sustained enthusiastic action with unflagging vitality wordnet

Etymology

Etymology 1

From tire (“to become sleepy or weary”) + -less

Etymology 2

From tire + -less.

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