a futile endeavor, a brave but useless attempt

to endeavor, to make an effort

an effort, an endeavor

(rare) bear fruit

the result, effect, consequence / the performance, the accomplishment, the achievement

a mantis (any of various large insects of the order Mantodea) / (by extension, from the slender build of the insect) a skinny person or horse / (rare) a fourspine sculpin, a fish of species Cottus kazika

a mantis

same, identical / common, similar

anyhow, anyway

(informal) The iteration mark 々, which indicates that the previous kanji ought to be repeated.