1727, "without the organized structure which characterizes living things," from in- (1) "not, opposite of" + organic (adj.). Inorganical in this sense is from 1670s. Meaning "not arriving by natural growth" is recorded from 1862.
hydrochloric and sulfuric acids are called inorganic substances
inofficious
inoperable
inoperative
inopportune
inordinate
inorganic
in-patient
input
inquest
inquiline
inquire