無益 is read as むえき (mueki) and means useless.
むえき
mueki
むえきゆうがい
useless and harmful
もんどうむえき
there being no use in arguing (about it)
ゆうがいむえき
more harm than good
ゆうえきむがい
beneficial and harmless
むじょうけん
unconditional
むし
disregarding
むえん
unrelated to the teachings of Buddha
むだ
futility
むだづかい
waste (of money, time, etc.)
むぼう
reckless
むじゃき
innocent
むさくい
random