noun
inorganic matter; mineral matter
Refers to substances not derived from living organisms; used in scientific and everyday contexts.
このサプリメントは無機質を含んでいない。
This supplement does not contain inorganic matter.
土壌中の無機質が植
Inorganic matter in the soil affects plant growth.
na-adjective
Describes a person, atmosphere, or expression that lacks warmth or emotion; often used for a sterile, mechanical, or impersonal quality.
彼の無機質な返事にがっかりした。
I was disappointed by his cold, robotic reply.
病院の待合室は無機質な雰囲気だった。
The hospital waiting room had an impersonal, sterile atmosphere.
有機質 means 'organic matter', the opposite of 無機質 in the material sense. It does not carry the adjectival meaning of 'cold/inhuman'.
Compound of 無 (mu, 'without') + 機 (ki, 'mechanism; life') + 質 (shitsu, 'substance; quality'). The adjectival sense derives from the idea of being as lifeless and cold as inorganic matter.