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

merciless, harden, heartless, ruthless

powerless, feel weak, lack strength, incapable

completely lacking any feeling or sense of justice (idiom), cold and ruthless

没有办法, 不知道怎么办

infinite, endless, inexhaustible