merciless, harden, heartless, ruthless

infinite, endless, inexhaustible

没有能力和力量

selfless, unselfish, disinterested, altruistic

disregarding, aught, in any event, anyway, in any case, ought, at any rate, no matter what happens, irrespective, no matter, however, leastwise, anyhow, anywise, irregardless, leastways, whatever may come, disregardless, no matter what, regardless, come hell or high water, in_any_case

to have nothing to do, to idle one's time away (idiom)