無機 is read as むき (muki) and means inorganic.
むき
muki
むじんき
drone
むきぶつ
inorganic substance
むきしつ
inorganic matter
むきこうぶんし
inorganic polymer
むきかがく
inorganic chemistry
むきかごうぶつ
inorganic compound
むじん
shorthandedness
むちゃ
rash
むりやり
forcibly
むり
impossible
むりょう
free (of charge)
ぶじ
good health